Movatterモバイル変換

[0]ホーム

Jump to content

Portal:Outer space

Edit links

From Wikipedia, the free encyclopedia

Wikipedia's portal for exploring content related to Outer space

Portal maintenance status:(April 2019)

This portal'ssubpageshave been checked by an editor, and are needed.

Pleasetake care when editing, especially if usingautomated editing software. Learn how toupdate the maintenance information here.

The Outer Space Portal

Introduction

The lower half shows a blue planet with patchy white clouds. The upper half has a man in a white spacesuit and maneuvering unit against a black background. — Because of the hazards of a vacuum, astronauts must wear a pressurizedspace suit while off-Earth and outside their spacecraft.

Shortcut

P:OSP:OS

Outer space, or simplyspace, is the expanse that exists beyondEarth's atmosphere and betweencelestial bodies. It contains ultra-lowlevels of particle densities, constituting anear-perfect vacuum of predominantlyhydrogen andhelium plasma, permeated byelectromagnetic radiation,cosmic rays,neutrinos,magnetic fields anddust. The baselinetemperature of outer space, as set by thebackground radiation from theBig Bang, is 2.7 kelvins (−270 °C; −455 °F).

Theplasma between galaxies is thought to account for about half of thebaryonic (ordinary) matter in the universe, having anumber density of less than onehydrogen atom per cubic metre and akinetic temperature of millions ofkelvins. Local concentrations of matter have condensed intostars andgalaxies. Intergalactic space takes up most of the volume of theuniverse, but even galaxies andstar systems consist almost entirely of empty space. Most of the remainingmass-energy in theobservable universe is made up of an unknown form, dubbeddark matter anddark energy.

Outer space does not begin at a definite altitude above Earth's surface. TheKármán line, an altitude of 100 km (62 mi) abovesea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. Certain portions of the upperstratosphere and themesosphere are sometimes referred to as "near space". The framework for internationalspace law was established by theOuter Space Treaty, which entered into force on 10 October 1967. This treaty precludes any claims ofnational sovereignty and permits all states to freelyexplore outer space. Despite the drafting ofUN resolutions for the peaceful uses of outer space,anti-satellite weapons have been tested inEarth orbit.

The concept that the space between the Earth and the Moon must be a vacuum was first proposed in the 17th century after scientists discovered thatair pressure decreased with altitude. The immense scale of outer space was grasped in the 20th century when the distance to theAndromeda Galaxy was first measured. Humans began the physical exploration of space later in the same century with the advent of high-altitudeballoon flights. This was followed by crewedrocket flights and, then, crewed Earth orbit, first achieved byYuri Gagarin of theSoviet Union in 1961. The economic cost of putting objects, including humans, into space is very high, limiting humanspaceflight tolow Earth orbit and theMoon. On the other hand,uncrewed spacecraft have reached all of the knownplanets in theSolar System. Outer space represents a challenging environment forhuman exploration because of the hazards ofvacuum andradiation.Microgravity has a negative effect on humanphysiology that causes bothmuscle atrophy andbone loss. (Full article...)

Refresh with new selections below (purge)

edit

Selected article

Ariel is the brightest and third most massive of the 28 knownmoons of Uranus. Discovered on 24 October 1851 byWilliam Lassell, it is named for asky spirit in Alexander Pope'sThe Rape of the Lock and Shakespeare'sThe Tempest. Like its parent planet, Ariel orbits on its side, giving it an extreme seasonal cycle. As of 2011, almost all knowledge of Ariel derives from a singleflyby of Uranus performed by the spacecraftVoyager 2 in 1986, which managed to image 35% of the moon's surface. There are no plans at present to return to study the moon in more detail. AfterMiranda, Ariel is the second-smallest of Uranus's five round satellites, and the second-closest to its planet. Among the smallest of the Solar System's 19 known spherical moons (it ranks 14th among them in diameter), Ariel is composed of roughly equal parts ice and rocky material. Like all of Uranus's moons, Ariel probably formed from anaccretion disk that surrounded the planet shortly after its formation, and, like other large moons, it may bedifferentiated, with an inner core of rock surrounded by amantle of ice. Ariel has a complex surface comprising extensive cratered terrain cross-cut by a system ofscarps, canyons and ridges. The surface shows signs of more recent geological activity than other Uranian moons, most likely due totidal heating.

More selected articles

Read more

Selected picture

Image 1
Pioneer plaque
Pioneer plaque
Credit: Carl Sagan,Frank Drake,Linda Salzman Sagan
ThePioneer plaque, which was included on bothPioneer 10 andPioneer 11 unmannedspacecraft, the first man-made objects to leave theSolar System. Made fromgold-anodised aluminium, the plaque shows the figures of a man and a woman along with several symbols that are designed to provide information about the origin of the spacecraft. However, themean time for the spacecraft to come within 30astronomical units of astar is longer than the current age ofour galaxy.
'"`UNIQ--templatestyles-00000015-QINU`"'
- More selected pictures
Image 2
Kepler's Supernova
Supernova remnant
Credit: NASA
ThisSupernova remnant ofKepler's Supernova (SN 1604) is made up of the materials left behind by the gigantic explosion of a star. There are two possible routes to this end: either a massive star may cease to generate fusion energy in its core, and collapse inward under the force of its own gravity, or awhite dwarf star may accumulate material from a companion star until it reaches a critical mass and undergoes a similar collapse. In either case, the resulting supernova explosion expels much or all of the stellar material with great force.
'"`UNIQ--templatestyles-00000017-QINU`"'
- More selected pictures
Image 3
433 Eros asteroid
433 Eros
Credit: NASA
Theasteroid433 Eros was named after theGreek god oflove Eros. ThisS-type asteroid is the second-largestnear-Earth asteroid. This image shows the view looking from one end of theasteroid across the gouge on its underside and toward the opposite end.
'"`UNIQ--templatestyles-00000013-QINU`"'
- More selected pictures
Image 4
Needle Galaxy
Photograph:Ken Crawford
NGC 4565 (also known as the Needle Galaxy) is an edge-onspiral galaxy about 30 to 50 millionlight-years away in theconstellation Coma Berenices. NGC 4565 is a giant spiral galaxy more luminous than theAndromeda Galaxy, and has a population of roughly 240 globular clusters, more than theMilky Way.
More selected pictures
Image 5
Space Shuttle Atlantis launch plume
Space Shuttle program
Credit: NASA/Fir0002
The launch ofSpace ShuttleAtlantis onSTS-98,February 7 2001, at sunset. The sun is behind the camera, and the shape of theplume is cast across the vault of the sky, intersecting the rising full moon. The top portion of the plume is bright because it is illuminated directly by the sun; the lower portions are in the Earth's shadow. After launch, the shuttle must engage in apitch and roll program so that the vehicle is below theexternal tank andSRBs, as evidenced in the plume trail. The vehicle climbs in a progressively flattening arc, because achieving loworbit requires much more horizontal than verticalacceleration.
'"`UNIQ--templatestyles-00000019-QINU`"'
- More selected pictures
Image 6
Earthrise, as seen by Apollo 8
Apollo 8
Credit: William Anders
"Earthrise," the first occasion in which humans saw theEarth seemingly rising above the surface of theMoon, taken during theApollo 8 mission on December 24, 1968. This view was seen by the crew at the beginning of its fourthorbit around the Moon, although the veryfirst photograph taken was in black-and-white. Note that the Earth is in shadow here. A photo of afully lit Earth would not be taken until theApollo 17 mission.
'"`UNIQ--templatestyles-0000001D-QINU`"'
- More selected pictures
Image 7
Jupiter
Diagram:Kelvin Song
A diagram ofJupiter showing a model of the planet's interior, with a rockycore overlaid by a deep layer of liquidmetallic hydrogen and an outer layer predominantly ofmolecular hydrogen. Jupiter's true interior composition is uncertain. For instance, the core may have shrunk as convection currents of hot liquid metallic hydrogen mixed with the molten core and carried its contents to higher levels in the planetary interior. Furthermore, there is no clear physical boundary between the hydrogen layers—with increasing depth the gas increases smoothly in temperature and density, ultimately becoming liquid.
More selected pictures
Image 8
Lunar phase
Image:Tom Ruen
Ananimation of thephases of the Moon. As the Moon revolves around theEarth, theSun lights the Moon from a different side, creating the different phases. In the image, the Moon appears to get bigger as well as "wobble" slightly.Tidal locking synchronizes the Moon'srotation period on its axis to match itsorbital period around the earth. These two periods nearly cancel each other out, except that the Moon's orbit iselliptical. This causes its orbital motion to speed up whencloser to the Earth, and slow down when farther away, causing the Moon'sapparent diameter to change, as well as the wobbling motion observed.
More selected pictures
Image 9
Helix Nebula
Photograph:NASA/JPL-Caltech/University of Arizona
TheHelix Nebula is a largeplanetary nebula located in theconstellation Aquarius. Discovered byKarl Ludwig Harding, probably before 1824, it is one of the closest to Earth of all the bright planetary nebulae, about 215 parsecs (700light-years) away. It is similar in appearance to theCat's Eye Nebula and theRing Nebula.
More selected pictures
Image 10
Geology of Venus
Image credit:NASA
Aradar image of thesurface of Venus, centered at 180 degrees east longitude. This composite image was created from mapping by theMagellan probe, supplemented by data gathered by thePioneer orbiter, with simulated hues based on color images recorded byVenera 13 and14. Noprobe has been able to survive more than a few hours onVenus's surface, which is completely obscured by clouds, because theatmospheric pressure is some 90 times that of the Earth's, and its surface temperature is around 450 °C (842 °F).
More selected pictures
Image 11
Pale Blue Dot
Photo credit:NASA/JPL
Pale Blue Dot is the name given to this 1990 photo ofEarth taken fromVoyager 1 when its vantage point reached the edge of theSolar System, a distance of roughly 3.7 billion miles (6 billion kilometres). Earth can be seen as a blueish-white speck approximately halfway down the brown band to the right. The light band over Earth is an artifact of sunlightscattering in the camera'slens, resulting from the small angle between Earth and theSun.Carl Sagan came up with the idea of turning the spacecraft around to take a composite image of the Solar System. Six years later, he reflected, "All of human history has happened on that tiny pixel, which is our only home."
More selected pictures
Image 12
Astronaut Steve Robinson on a spacewalk, August 2005
Extra-vehicular activity
Credit: NASA
Extra-vehicular activity (EVA) is work done by anastronaut away from the Earth and outside of his or herspacecraft. EVAs may be made outside a craft orbiting Earth (aspacewalk) or on the surface of the Moon (amoonwalk). Shown here isSteve Robinson on the first EVA to perform anin-flight repair of theSpace Shuttle (August 3 2005).
'"`UNIQ--templatestyles-0000001F-QINU`"'
- More selected pictures
Image 13
Jupiter
Image credit:NASA
Ananimated view ofVoyager I's approach toJupiter. Oneframe of this image was taken each Jupiter day (approximately 10 hours) between January 6 and February 9, 1979, as thespace probe flew from 58 million to 31 million kilometers from Jupiter during that time. The small, round, dark spots appearing in some frames are the shadows cast by themoons passing between Jupiter and theSun, while the small, white flashes around the planet, are the moons themselves.
More selected pictures
Image 14
Europa (moon)
Photo credit:NASA/JPL
Realistic-color mosaic of images ofJupiter's moonEuropa taken by NASA's Jupiter orbiterGalileo in 1995 and 1998. This view of the moon'santi-Jovian hemisphere shows numerouslineae, linear features created via atectonic process in which crustal plates of water ice floating on asubsurface ocean (kept warm bytidal flexing) shift in relative position. Reddish regions are areas where the ice has a higher mineral content. The north polar region is at right. (Geologic features are annotated inCommons.)
More selected pictures
Image 15
Mercury (planet)
Photograph:NASA/APL/CIS; edit:Jjron
Mercury is the smallest and closest to theSun of the eightplanets in theSolar System. It has no knownnatural satellites. The planet is named after theRoman deity Mercury, the messenger to the gods.
More selected pictures
Image 16
Lunar rover
Photo credit:Harrison Schmitt
AstronautEugene Cernan makes a short test drive of thelunar rover (officially, Lunar Roving Vehicle or LRV) during the early part of the firstApollo 17 extravehicular activity. The LRV was only used in the last threeApollo missions, but it performed without any major problems and allowed the astronauts to cover far more ground than in previous missions. All three LRVs were abandoned on the Moon.
More selected pictures
Image 17
Planum Boreum
Photo credit:Mars Reconnaissance Orbiter
False-color Mars Reconnaissance Orbiter image of a side of the Chasma Boreale, a canyon in the polarice cap of thePlanum Boreum (north pole ofMars). Light browns are layers of surface dust, greys and blues are layers ofwater andcarbon dioxide ice. Regular geometric cracking is indicative of higher concentrations of water ice.

The Planum Boreum's permanent ice cap has a maximum depth of 3 km (1.9 mi). It is roughly 1200 km (750 mi) in diameter, an area equivalent to about 1½ times the size ofTexas. The Chasma Boreale is up to 100 km (62.5 mi) wide and featuresscarps up to 2 km (1.25 mi) high. For a comparison, theGrand Canyon is approximately 1.6 km (1 mi) deep in some places and 446 km (279 mi) long but only up to 24 km (15 mi) wide.
More selected pictures
Image 18
Cassini–Huygens
Photograph credit:NASA /JPL /Space Science Institute
TheCassini–Huygensspace-research project involved a collaboration betweenNASA, theEuropean Space Agency, and theItalian Space Agency to send aprobe to study the planetSaturn and its system, includingits rings andits natural satellites.

This natural-color mosaic image, combining thirty photographs, was taken by theCassini orbiter over the course of approximately two hours on 23 July 2008 as it panned its wide-angle camera across Saturn and its ring system as the planet approachedequinox. Six moons are pictured in the panorama, with the largest,Titan, visible at the bottom left.
More selected pictures
Image 19
Space ShuttleEndeavour
Photo:NASA/Crew of Expedition 22
Space ShuttleEndeavour in a photograph taken from theInternational Space Station, in which the shuttle appears to straddle thestratosphere andmesosphere. During this mission,STS-130, the shuttle's primary payloads were theTranquility module and theCupola, a robotic control station which provides a 360-degree view around the station.
More selected pictures
Image 20
STS-1
Photo credit:NASA
A timed exposure of the firstSpace Shuttle mission,STS-1. The shuttleColumbia stands on launch pad A atKennedy Space Center, the night before launch. The objectives of the maiden flight were to check out the overall Shuttle system, accomplish a safe ascent intoorbit and to return to Earth for a safe landing.
More selected pictures
Image 21
Uranus
Photo:NASA/JPL/Voyager 2 mission
Uranus is the seventh planet from theSun and the fourth most massive in theSolar System. In this photograph from 1986 the planet appears almost featureless, but recent terrestrial observations have found seasonal changes to be occurring.
More selected pictures
Image 22
TRACE image of sunspots
Sunspot
Credit: NASA/TRACE
ATRACE image ofsunspots on the surface, orphotosphere, of thesun from September2002, is taken in the farultraviolet on a relatively quiet day for solar activity. However, the image still shows a large sunspot group visible as a bright area near the horizon. Although sunspots are relatively cool regions on the surface of the sun, the bright glowing gas flowing around the sunspots have a temperature of over one million °C (1.8 million °F). The hightemperatures are thought to be related to the rapidly changingmagnetic field loops that channel solarplasma.
'"`UNIQ--templatestyles-0000001B-QINU`"'
- More selected pictures

edit

Space-related portals

General images

The following are images from various outer space-related articles on Wikipedia.

Image 1Astronaut Piers Sellers during the third spacewalk ofSTS-121, a demonstration of orbiter heat shield repair techniques (fromOutline of space science)
Image 2Baker-Nunn cameras were widely used to study space debris. (fromSpace debris)
Image 3Illustration of a satellite breaking up into multiple pieces at higher altitudes (fromSpace debris)
Image 4First television image of Earth from space, taken byTIROS-1 (1960) (fromSpace exploration)
Image 5Crew quarters onZvezda, the base ISS crew module (fromSpace exploration)
Image 6Smooth chondrite interplanetary dust particle. (fromCosmic dust)
Image 7Saudi officials inspect a crashedPAM-D module in January 2001. (fromSpace debris)
Image 8After reentry, Delta 2 second stage pieces were found in South Africa. (fromSpace debris)
Image 9Tupan Patera on Jupiter's moon Io (fromSpace exploration)
Image 10Astronomers used theJames Webb Space Telescope to image the warm dust around a nearby young star, Fomalhaut, in order to study the firstasteroid belt ever seen outside of the Solar System in infrared light. (fromCosmic dust)
Image 11Map showing theSun located near the edge of the Local Interstellar Cloud andAlpha Centauri about 4light-years away in the neighboringG-Cloud complex (fromInterstellar medium)
Image 12Debris density in low Earth orbit (fromSpace debris)
Image 13Conventional anti-satellite weapons such as theSM-3 missile remain legal under thelaw of armed conflict, even though they create hazardousspace debris (fromOuter space)
Image 14Major elements of 200 stratospheric interplanetary dust particles. (fromCosmic dust)
Image 15Interstellar medium andastrosphere meeting (fromInterstellar medium)
Image 16Surface of Mars by theSpirit rover (2004) (fromSpace exploration)
Image 17Voyager 1 is the first artificial object to reach the interstellar medium. (fromInterstellar medium)
Image 18Artistic image of a rocket lifting from a Saturn moon (fromSpace exploration)
Image 19Gabbard diagram of debris from the disintegration of the third stage of a Chinese Long March 4 booster (fromSpace debris)
Image 20Spent upper stage of aDelta II rocket, photographed by theXSS 10 satellite (fromSpace debris)
Image 21Cosmic dust of theHorsehead Nebula as revealed by theHubble Space Telescope. (fromCosmic dust)
Image 22A wide field view of outer space as seen from Earth's surface at night. Theinterplanetary dust cloud is visible as the horizontal band ofzodiacal light, including thefalse dawn (edges) andgegenschein (center), which is visually crossed by theMilky Way (fromOuter space)
Image 23Vanguard 1 is expected to remain in orbit for 240 years. (fromSpace debris)
Image 24This light-year-long knot of interstellar gas and dust resembles acaterpillar. (fromInterstellar medium)
Image 25Amicrometeoroid left this crater on the surface ofSpace Shuttle Challenger's front window onSTS-7. (fromSpace debris)
Image 26Cosmic dust of theAndromeda Galaxy as revealed in infrared light by theSpitzer Space Telescope. (fromCosmic dust)
Image 27For the first time, theNASA /ESA /Canadian Space Agency /James Webb Space Telescope has observed the chemical signature of carbon-rich dust grains at redshift z ≈ 7, which is roughly equivalent to one billion years after the birth of the Universe, this observation suggests exciting avenues of investigation into both the production of cosmic dust and the earliest stellar populations in our Universe. (fromCosmic dust)
Image 28Porouschondrite dust particle (fromCosmic dust)
Image 29Earth and the Moon as seen from cislunar space on the 2022Artemis 1 mission (fromOuter space)
Image 30AstronautBuzz Aldrin had a personal Communion service when he first arrived on the surface of theMoon. (fromSpace exploration)
Image 31Perseverance's backshell sitting upright on the surface of Jezero Crater (fromSpace debris)
Image 32Model of Vostok spacecraft (fromSpace exploration)
Image 33The diversity found in the different types and scales of astronomical objects make the field of study increasingly specialized. (fromOutline of space science)
Image 34Distribution of Matter in a cubic section of the universe. The blue fiber-like structures represent matter, while the empty regions show thecosmic voids (fromOuter space)
Image 35Apollo Command Service Module in lunar orbit (fromSpace exploration)
Image 36Reconstruction of solar activity over 11,400 years. Period of equally high activity over 8,000 years ago marked. (fromSpace climate)
Image 37The sparse plasma (blue) and dust (white) in the tail ofcomet Hale–Bopp are being shaped by pressure fromsolar radiation and the solar wind, respectively.
Image 38Three-dimensional structure inPillars of Creation. (fromInterstellar medium)
Image 39A driftingthermal blanket photographed in 1998 duringSTS-88 (fromSpace debris)
Image 40Gabbard diagram of almost 300 pieces of debris from the disintegration of the five-month-old third stage of the Chinese Long March 4 booster on 11 March 2000 (fromSpace debris)
Image 41The distribution ofionized hydrogen (known by astronomers as H II from old spectroscopic terminology) in the parts of the Galactic interstellar medium visible from the Earth's northern hemisphere as observed with the Wisconsin Hα Mapper (Haffner et al. 2003) harv error: no target: CITEREFHaffnerReynoldsTufteMadsen2003 (help). (fromInterstellar medium)
Image 42Space Shuttle Endeavour had a major impact on its radiator duringSTS-118. The entry hole is about 5.5 mm (0.22 in), and the exit hole is twice as large. (fromSpace debris)
Image 43Asteroid4 Vesta, imaged by theDawn spacecraft (2011) (fromSpace exploration)
Image 44Zodiacal light caused by cosmic dust. (fromCosmic dust)
Image 45Bow shock formed by themagnetosphere of the young starLL Orionis (center) as it collides with theOrion Nebula flow
Image 46V-2 Rocket in the Peenemünde Museum (fromSpace exploration)
Image 47AMESSENGER image from 18,000 km showing a region about 500 km across (2008) (fromSpace exploration)
Image 48View fromInternational Space Station, showing the yellow-greenairglow of Earth'sionosphere with the Milky Way in the background. (fromOuter space)
Image 49Illustration of Earth's atmosphere gradual transition into outer space (fromOuter space)
Image 50Known orbit planes ofFengyun-1C debris one month after the weather satellite's disintegration by theChinese ASAT (fromSpace debris)
Image 51Atmospheric attenuation indB/km as a function of frequency over the EHF band. Peaks in absorption at specific frequencies are a problem, due to atmosphere constituents such as water vapor (H₂O) and carbon dioxide (CO₂). (fromInterstellar medium)
Image 52A dusty trail from the early Solar System to carbonaceous dust today. (fromCosmic dust)
Image 53The originalMagdeburg hemispheres (left) used to demonstrate Otto von Guericke's vacuum pump (right)
Image 54Timeline of theexpansion of the universe, where space is represented schematically at each time by circular sections. On the left, the dramatic expansion ofinflation; at the center, the expansionaccelerates (artist's concept; neither time nor size are to scale) (fromOuter space)
Image 55A computer-generated animation by theEuropean Space Agency representing space debris in low earth orbit at the current rate of growth compared to mitigation measures being taken (fromSpace debris)
Image 56A proposed timeline of the origin of space, fromphysical cosmology (fromOutline of space science)
Image 57Spatial density of space debris by altitude according to ESA MASTER-2001, without debris from the Chinese ASAT and 2009 collision events (fromSpace debris)
Image 58TheLong Duration Exposure Facility (LDEF) is an important source of information on small-particle space debris. (fromSpace debris)
Image 59NASA computer-generated image of debris objects in Earth orbit, c. 2005 (fromSpace debris)
Image 60Apollo 16 LEM Orion, theLunar Roving Vehicle and astronautJohn Young (1972) (fromSpace exploration)
Image 61Near-Earth space showing the low-Earth (blue), medium Earth (green), and high Earth (red) orbits. The last extends beyond the radius of geosynchronous orbits (fromOuter space)
Image 62Delta-v's in km/s for various orbital maneuvers (fromSpace exploration)
Image 63Growth of tracked objects in orbit and related events; efforts to manageouter space global commons have so far not reduced the debris or the growth of objects in orbit (fromSpace debris)
Image 64Buzz Aldrin taking acore sample of theMoon during theApollo 11 mission (fromSpace exploration)
Image 65Artist's impression of dust formation around a supernova explosion. (fromCosmic dust)
Image 66Herbig–Haro object HH 110 ejects gas through interstellar space. (fromInterstellar medium)
Image 67A laser-guided observation of theMilky Way Galaxy at theParanal Observatory in Chile in 2010 (fromOutline of space science)
Image 68Infographic showing the space debris situation in different kinds of orbits around Earth (fromSpace debris)
Image 69Self-portrait ofCuriosity rover onMars's surface (fromSpace exploration)
Image 70View of an orbital debris hole made in the panel of theSolar Max satellite (fromSpace debris)
Image 71Because of the hazards of a vacuum, astronauts must wear a pressurizedspace suit while outside their spacecraft.
Image 72Space debris identified as WT1190F, burning up in a fireball over Sri Lanka (fromSpace debris)
Image 73Debris impacts onMir's solar panels degraded their performance. The damage is most noticeable on the panel on the right, which is facing the camera with a high degree of contrast. Extensive damage to the smaller panel below is due to impact with a Progress spacecraft. (fromSpace debris)
Image 74Concept art for a NASA Vision mission (fromSpace exploration)
Image 75Spatial density of LEO space debris by altitude, according to 2011 a NASA report to theUnited Nations Office for Outer Space Affairs (fromSpace debris)
Image 76South is up in thefirst image of Earth taken by a person, probably byBill Anders (during the 1968Apollo 8 mission) (fromOuter space)
Image 77A computer-generated map of objects orbiting Earth, as of 2005. About 95% are debris, not working artificial satellites (fromOuter space)
Image 78Objects in Earth orbit including fragmentation debris, November 2020, NASA: ODPO (fromSpace debris)
Image 79Concept for aspace-based solar power system to beam energy down to Earth (fromOuter space)
Image 80Comet103P/Hartley (2010) (fromSpace exploration)
Image 81Newton's cannonball, an illustration of how objects can "fall" in a curve around the planet (fromOuter space)

Did you know(auto-generated)

... that, for theSpace 220 Restaurant, Disney reached out to NASA engineers to understand what a space elevator might look like?
... that some severeenvironmental impacts of the invasion of Ukraine can be seen from space?
... that thespace industry of India has supported the launch of more than 100 domestic satellites and more than 300 foreign satellites?
... thatNature's Fynd, producer ofmicrobe-based meat substitutes, is working withNASA to develop abioreactor for use in space travel?
... thatLouis W. Roberts was among the highest ranking African-American space program staff atNASA while theApollo program was underway?

edit

Space news

2025 in space

« 2024
2026 »

Space probe launches

Hakuto-R Mission 2 (January)
Blue Ghost Mission 1 (January)
IM-2 (February)
SPHEREx (March)
Tianwen-2 (May)
Interstellar Mapping and Acceleration Probe (September)
Pandora Mission (September)

SelectedNEOs

Discoveries

128moons of Saturn
2moons of Jupiter
1moon of Uranus (S/2025 U 1)
2017 OF201
2020 VN40
2023 KQ14
Altieri's lens
ASKAP J1832−0911
Atmospheric structure ofWASP-121b
Possible imaging ofa Betelgeuse companion (unconfirmed)
Eos cloud
MoM-z14
Quipu (supercluster)
Vera C. Rubin Observatory first light discovery of 2,000+ asteroids
GW250114
GRB 250702BDE

Exoplanets	Alpha Centauri Ab (unconfirmed) Barnard's Star b c d e BD+05 4868Ab TWA 7 b WISPIT 2b

Comets

Novae

Space exploration

Lucy flyby of52246 Donaldjohanson

Miscellaneous events

K2-18b biosignature controversy
Newly nameddwarf planet candidates Máni,Aya,Achlys,Ritona,Chiminigagua,Uni,Rumina,Xewioso,Goibniu

edit

Upcoming spaceflight launches

For a full schedule of launches and deep-space rendezvous, see2025 in spaceflight.

Astronomical events

v t e Celestial events by month
Portal:Astronomy andPortal:Outer space
2025	January February March April May June July August September October November December
2024	January February March April May June July August September October November December
2023	January February March April May June July August September October November December
2022	January February March April May June July August September October November December
2021	January February March April May June July August September October November December
2020	January February March April May June July August September October November December
2019	January February March April May June July August September October November December
2018	January February March April May June July August September October November December
2017	January February March April May June July August September October November December
2016	January February March April May June July August September October November December
2015	January February March April May June July August September October November December
2014	January February March April May June July August September October November December
2013	January February March April May June July August September October November December
2012	January February March April May June July August September October November December
2011	January February March April May June July August September October November December
2010	January February March April May June July August September October November December
2009	January February March April May June July August September October November December
2008	January February March April May June July August September October November December
2007	January February March April May June July August September October November December
2006	January February March April May June July August September October November December
2005	January February March April May June July August September October November December

Topics

... in space

Biology

Human	The human body Hygiene Locomotion Medicine Neuroscience Psychology Psychological and sociological effects Sex Sleep
Non-human	Animals Cats Cockroaches Dogs Frogs Fruit flies Mice Primates Tardigrades Tortoises Extraterrestrial life Microorganisms Plants Astrobotany

Environment

Society

Advertising
Alcohol
Archaeology
- of Earth
- of items in space
Art
Burial
Colonization
Economy
- Mining
- Trade
Ethics
Exploration
Food
Law
Military
Music
Religion
- Christmas
Selfies
Tourism
Voting
War
Women

Technology

Human spaceflight	Accidents Architecture Farming Food Carbonated drinks Toilets Writing
Other technologies	Logistics Manufacturing Mining Power Batteries Nuclear Solar for Earth for spacecraft Radar Telescopes Weapons

Outer space portal

Molecules detected in outer space

Molecules

Diatomic	Aluminium monochloride Aluminium monofluoride Aluminium(II) oxide Argonium Carbon cation Carbon monophosphide Carbon monosulfide Carbon monoxide Cyano radical Diatomic carbon Fluoromethylidynium Helium hydride ion Hydrogen chloride Hydrogen fluoride Hydrogen (molecular) Hydroxyl radical Imidogen Iron(II) oxide Magnesium monohydride Methylidyne radical Nitric oxide Nitrogen (molecular) Oxygen (molecular) Phosphorus monoxide Phosphorus mononitride Potassium chloride Silicon carbide Silicon monoxide Silicon monosulfide Sodium chloride Sodium iodide Sulfanyl Sulfur mononitride Sulfur monoxide Titanium(II) oxide
Triatomic	Aluminium(I) hydroxide Aluminium isocyanide Amino radical Carbon dioxide Carbonyl sulfide CCP radical Chloronium Diazenylium Dicarbon monoxide Disilicon carbide Ethynyl radical Formyl radical Hydrogen cyanide (HCN) Hydrogen isocyanide (HNC) Hydrogen sulfide Hydroperoxyl Iron cyanide Isoformyl Magnesium cyanide Magnesium isocyanide Methylene Methylidynephosphane N₂H⁺ Nitrous oxide Nitroxyl Ozone Potassium cyanide Sodium cyanide Sodium hydroxide Silicon carbonitride c-Silicon dicarbide SiNC Sulfur dioxide Thioformyl Thioxoethenylidene Titanium dioxide Tricarbon Trihydrogen cation Water
Four atoms	Acetylene Ammonia Cyanoethynyl Formaldehyde Fulminic acid HCCN Hydrogen peroxide Hydromagnesium isocyanide Isocyanic acid Isothiocyanic acid Ketenyl Methyl cation Methyl radical Methylene amidogen Propynylidyne Protonated carbon dioxide Protonated hydrogen cyanide Silicon tricarbide Thiocyanic acid Thioformaldehyde Tricarbon monosulfide Tricarbon monoxide
Five atoms	Ammonium ion Butadiynyl Carbodiimide Cyanamide Cyanoacetylene Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde Silane Silicon-carbide cluster
Six atoms	Acetonitrile Cyanobutadiynyl radical Cyclopropenone Diacetylene E-Cyanomethanimine Ethylene Formamide HC₄N Ketenimine Methanethiol Methanol Methyl isocyanide Pentynylidyne Propynal Protonated cyanoacetylene
Seven atoms	Acetaldehyde Acrylonitrile Vinyl cyanide Cyanodiacetylene Ethylene oxide Glycolonitrile Hexatriynyl radical Methyl isocyanate Methylamine Propyne Vinyl alcohol
Eight atoms	Acetic acid Acrolein Aminoacetonitrile Cyanoallene Ethanimine Glycolaldehyde Hexapentaenylidene Methyl formate Methylcyanoacetylene
Nine atoms	Acetamide Cyanohexatriyne Dimethyl ether Ethanethiol Ethanol Methyldiacetylene N-Methylformamide Octatetraynyl radical Propene Propionitrile
Ten atoms or more	Acetone Benzene Benzonitrile Buckminsterfullerene (C₆₀, C₆₀⁺, fullerene, buckyball) Butyronitrile C₇₀ fullerene Cyanodecapentayne Ethyl formate Ethylene glycol Heptatrienyl radical Methyl acetate Methyl-cyano-diacetylene Methyltriacetylene Propionaldehyde Pyrimidine

Deuterated
molecules

Unconfirmed

By year

v t e 2020 in space
« 2019 2021 »
Space probe launches	Solar Orbiter (Feb 2020) Hope (Jul 2020) Tianwen-1 (Jul 2020) Mars 2020 (Jul 2020) Perseverance rover Mars HelicopterIngenuity Chang'e 5 (lunar sample return mission; Nov 2020)
Impact events	2020 China bolide
Selected NEOs	Asteroid close approaches 594913 ꞌAylóꞌchaxnim (809875) 2020 BX12 2020 CW 2020 CD3(temporary satellite) (52768) 1998 OR2 2020 HS7 2020 JJ 2020 LD (163348) 2002 NN4 2020 OY4 2020 QG 2011 ES4 2018 VP1 2020 SO(space debris) 2020 SW 2020 SL1 2020 UA 2020 VV 2020 VT4 (153201) 2000 WO107 (501647) 2014 SD224 (614689) 2020 XL5
Exoplanets	AU Mic b Gliese 414 Ab Ac Gliese 433 b c d GJ 1151 b radio emissions K2-315b Kepler-1649c KOI-456.04 Lacaille 9352 b c M51-ULS-1b OGLE-2016-BLG-1928(rogue planet) Tau Ceti j(predicted) TOI-561 b c d e TOI-700 b c d TOI-732 b c TOI-1338 b TOI-1339 b c d TYC 8998-760-1 c WD 1856+534 b
Discoveries	Betelgeuse dimming FRB 180916 location and periodicity Radcliffe wave Ophiuchus Supercluster explosion PSO J03094+27 (distant blazar) 2MASS J1047+21 wind speed measurements SGR 1935+2154 (soft gamma ray repeater) HR 6819 black hole hypothesis PHL 293B ending of P Cygni profile hydrogen emission lines Swift J1818.0–1607 (young magnetar) GW190814(announced) South Pole Wall GW190521(announced) Phosphine detection in theatmosphere of Venus Water detection on the sunlit surface of theMoon
Comets	C/2019 Y4 (ATLAS) P/2019 LD2 (ATLAS) C/2017 T2 (PANSTARRS) C/2020 F8 (SWAN) C/2019 U6 (LEMMON) C/2020 F3 (NEOWISE) 2P/Encke 88P/Howell C/2020 M3 (ATLAS) 156P/Russell–LINEAR C/2020 S3 (Erasmus)
Space exploration	Spitzer retirement (Jan 2020) BepiColombo (Earth gravity assist; Apr 2020, Venus gravity assist; Oct 2020) OSIRIS-REx (sample collection from asteroidBennu; Oct 2020) Hayabusa2 (sample return from asteroidRyugu; Dec 2020) Chang'e 5 (lunar sample return; Dec 2020)
Outer space portal Category:2019 in outer space —Category:2020 in outer space —Category:2021 in outer space

v t e 2019 in space
« 2018 2020 »
Space probe launches	Beresheet (lunar lander; Feb 2019) LightSail 2 (solar sail demonstration; Jun 2019) Chandrayaan-2 /Vikram /Pragyan (lunar obiter, lander and rover; Jul 2019)
Impact events	Kamchatka meteor (announced) 2019 MO
SelectedNEOs	Asteroid close approaches 2018 XB4 2019 AS5 2016 AZ8 66391 Moshup 2019 OK 1620 Geographos 2006 QV89 2100 Ra-Shalom 2019 SU3 2019 TA7 2019 UN13
Exoplanets	AD Leonis b Beta Pictoris c DS Tucanae b Gliese 251 c Gliese 357 d Gliese 588 b c Gliese 687 c Gliese 555 b Gliese 754 b Gliese 784 b HR 5183 b Kepler-47d confirmed K2-288Bb L 1159-16 b c d LP 816-60 b LTT 1445 Ab Luyten's Star d e PDS 70c Proxima Centauri c Struve 2398 Bb Bc Tau Ceti i (hypothesized) Teegarden's Star b c V1298 Tauri b c d e Wolf 359 b c
Discoveries	2019 AQ3 ASASSN-19bt AT2019qiz GRB 190114C EPIC 204376071 GW190412 GW190521g (first-ever light from bh-bh merger) GW190814 (first-ever "mass-gap" collision) J043947.08+163415.7 K2-18b water vapor M87* imaged PSR J0030+0451 mapped PSR J0740+6620 S5-HVS1 2I/Borisov 20 moons of Saturn WD 0145+234 detection ofexoasteroid disruption WD J0914+1914
Comets	C/2018 Y1 (Iwamoto) 78P/Gehrels 168P/Hergenrother 163P/NEAT 138P/Shoemaker–Levy 171P/Spahr 289P/Blanpain
Space exploration	New Horizons (encounter with486958 Arrokoth; Dec 2018 / Jan 2019) Chang'e 4 /Yutu-2 (landing on thefar side of the Moon; Jan 2019) Opportunity (end of mission; Aug 2018 / Feb 2019) Hayabusa2 (departure from162173 Ryugu; Dec 2019)
Outer space portal Category:2018 in outer space —Category:2019 in outer space —Category:2020 in outer space

v t e 2018 in space
« 2017 2019 »
Space probe launches	TESS (lunar flyby; Apr 2018) Queqiao (mission to theMoon; May 2018) InSight /Mars Cube One (mission toMars; May 2018) Parker Solar Probe (solar space mission; Aug 2018) BepiColombo (mission toMercury; Oct 2018) Chang'e 4 /Yutu-2 (mission to theMoon; Dec 2018)
Impact events	2018 LA Kamchatka meteor
SelectedNEOs	Asteroid close approaches 2010 WC9 2017 VR12 2017 YE5 (585310) 2017 YZ1 2018 AH 2018 BD 2018 BF3 2018 CB 2018 CC (276033) 2002 AJ129 (505657) 2014 SR339 2018 CF2 2018 CL 2018 CN2 2018 CY2 2018 DV1 2018 GE3 2018 PD20 (845854) 2018 LF16 2018 WV1 (163899) 2003 SD220
Exoplanets	Gliese 1132 c possibleexomoon Kepler-1625b I K2-141b K2-146b K2-148b K2-155d K2-229b K2-239b K2-239c K2-239d K2-288Bb EPIC 211945201 b HD 89345 b KELT-21b NGTS-3Ab
Discoveries	LSPM J0207+3331 VVV-WIT-07 MACS J1149 Lensed Star 1 10 moons of Jupiter 541132 Leleākūhonua(announced) Hyperion proto-supercluster 2MASS J18082002−5104378 Farout (2018 VG18) FarFarOut (2018 AG37first imaged) AT2018hyz SN 2018cow
Novae	V357 Muscae (Nova Muscae) V906 Carinae (Nova Carinae) V392 Persei (Nova Persei)
Comets	C/2017 T1 (Heinze) C/2017 U7 C/2018 C2 (Lemmon) 37P/Forbes 66P/du Toit 64P/Swift–Gehrels 38P/Stephan–Oterma C/2018 F4 (PanSTARRS) C/2018 V1 (Machholz-Fujikawa-Iwamoto) 46P/Wirtanen
Space exploration	Hayabusa2 (asteroidRyugu arrival; Jun 2018) Kepler retirement (Oct 2018) InSight (Mars landing; Oct 2018) Dawn retirement (Nov 2018) OSIRIS-REx (asteroidBennu arrival; Dec 2018) Voyager 2 (enters interstellar space; Dec 2018) New Horizons (encounter with486958 Arrokoth; Dec 2018 / Jan 2019)
Outer space portal 2017 in outer space —2018 in outer space —2019 in outer space

v t e 2017 in space
« 2016 2018 »
Space probe launches	ASTERIA (miniature space telescope; August 2017)
Impact events	Bolides in 2017 2017 China bolide
SelectedNEOs	Asteroid close approaches 2017 AG13 2017 BS5 2017 BQ6 2016 WF9 (671294) 2014 JO25 2017 OO1 2017 QP1 3122 Florence 2017 SX17 2012 TC4 2017 TD6 2017 VL2 2017 VW13 2017 XO2 3200 Phaethon
Exoplanets	HATS-36b HD 113996 b KELT-18b Kepler-19d Kepler-80g Kepler-90i K2-66b K2-138b LHS 1140 b Luyten b NGTS-1b OGLE-2016-BLG-1190Lb OGLE-2016-BLG-1195Lb Ross 128 b Tau Ceti g h TRAPPIST-1 e f g h darkalbedo ofWASP-12b WASP-107b YZ Ceti b c d
Discoveries	GW170104 Ring of Haumea 2moons of Jupiter GW170608 Saraswati Supercluster GW170814 IGR J17329-2731 (X-ray source) GW170817 neutron star merger ʻOumuamua ULAS J1342+0928 RZ Piscium
Comets	C/2016 U1 (NEOWISE) 41P/Tuttle–Giacobini–Kresák 103P/Hartley C/2015 ER₆₁ (PanSTARRS) C/2015 V2 (Johnson) P/2006 VW139 C/2017 O1 (ASASSN) 96P/Machholz
Space exploration	Cassini retirement (impacted into Saturn; Sep 2017) OSIRIS-REx (Earth gravity assist; Sep 2017)
Outer space portal Category:2016 in outer space —Category:2017 in outer space —Category:2018 in outer space

v t e 2016 in space
« 2015 2017 »
Space probe launches	Hitomi (X-ray observatory; Feb 2016) ExoMars Trace Gas Orbiter (Mars orbiter; Mar 2016) OSIRIS-REx (asteroid sample-return mission; Sep 2016)
Impact events	DN160822 03
SelectedNEOs	Asteroid close approaches (85990) 1999 JV6 1994 WR12 2013 TX68 2016 EU85 469219 Kamoʻoalewa 2016 PQ (164121) 2003 YT1
Exoplanets	38 Virginis b atmospheric composition of55 Cancri e BD+20 594b Gliese 536 b HD 19467 b HD 131399 Ab(retracted in 2022) HD 164922 c HIP 41378 b c d e f K2-33b K2-332 b K2-72 b c d e KELT-9b KELT-11b Kepler-20g Kepler-56d Kepler-737b Kepler-1229b Kepler-1520b Kepler-1625b Kepler-1638b Kepler-1647b OGLE-2007-BLG-349(AB)b OGLE-2012-BLG-0950Lb Proxima Centauri b Pr0211 c Qatar-3b Qatar-4b Qatar-5b TRAPPIST-1 b c d TW Hydrae b V830 Tauri b 2MASS J11193254–1137466 AB 2MASS J2126–8140 as planet
Discoveries	GW150914(announced) IDCS 1426 Planet Nine(hypothesized) GN-z11 SDSS J1240+6710 Crater 2 1 moon ofMakemake (S/2015 (136472) 1) GW151226(announced) (523794) 2015 RR245(announced) 1 moon ofGonggong (Xiangliu) BOSS Great Wall GRB 160625B 471325 Taowu(announced) 2014 UZ224(announced) WISE J080822.18-644357.3 Virgo I
Novae	ASASSN-15lh SN 2016aps ASASSN-16kt ASASSN-16ma
Comets	252P/LINEAR 460P/PanSTARRS 53P/Van Biesbroeck C/2016 R2 (PANSTARRS) 81P/Wild 9P/Tempel 144P/Kushida 43P/Wolf–Harrington 45P/Honda–Mrkos–Pajdušáková
Space exploration	Juno (enteredJupiter orbit; Jul 2016) Rosetta /Philae (end of mission tocomet 67P; Sep 2016) Schiaparelli EDM (Mars lander; Oct 2016)
Outer space portal Category:2015 in outer space —Category:2016 in outer space —Category:2017 in outer space

2015 in space

« 2014
2016 »

Space probe launches

Space probes	SMAP (weather satellite; Jan 2015) LISA Pathfinder (technology demonstration; Dec 2015)
Space observatories	DSCOVR (weather satellite; Feb 2015) Astrosat (space telescope; Sep 2015)