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The Solar System Portal

TheSun and planets of the Solar System(distances not to scale)

TheSolar System is thegravitationally bound system of theSun and the masses thatorbit it, most prominently its eightplanets, of whichEarth is one. The systemformed about 4.6 billion years ago when a dense region of amolecular cloud collapsed, creating the Sun and aprotoplanetary disc from which the orbiting bodies assembled. Inside theSun's core hydrogenis fused into helium for billions of years, releasing energy which is over even longer periods of time emitted through the Sun's outer layer, thephotosphere. This creates theheliosphere and a decreasing temperaturegradient across the Solar System.

The mass of the Solar System is by 99.86% almost completely made up of the Sun's mass. The nextmost massive objects of the system are the eight planets, which by definition dominate the orbits they occupy. Closest to the Sun in order of increasing distance are the fourterrestrial planets –Mercury,Venus, Earth andMars. These are the planets of theinner Solar System. Earth and Mars are the only planets in the Solar System which orbit within the Sun'shabitable zone, in which the sunlight can make surface water under atmospheric pressure liquid. Beyond thefrost line at about fiveastronomical units (AU), are twogas giants –Jupiter andSaturn – and twoice giants –Uranus andNeptune. These are the planets of theouter Solar System. Jupiter and Saturn possess nearly 90% of the non-stellar mass of the Solar System.

Additionally to the planets there are in the Solar System otherplanetary-mass objects, but which do not dominate their orbits, such asdwarf planets andplanetary-mass moons. TheInternational Astronomical Union's Minor Planet Center listsCeres,Pluto,Eris,Makemake, andHaumea as dwarf planets. Four otherSolar System objects are generally identified as such:Orcus,Quaoar,Gonggong, andSedna.Natural satellites, which are commonly called 'moons', can be found throughout the Solar System and in sizes from planetary-mass moons to much less massivemoonlets at their smallest. The largest two moons (Ganymede of Jupiter andTitan of Saturn) are larger than the smallest planet (Mercury), while the seven most massive, which includes Earth'sMoon, are more massive and larger than any of the dwarf planets.Less massive than these planetary-mass objects are the vast number ofsmall Solar System bodies, such asasteroids,comets,centaurs,meteoroids, andinterplanetary dust clouds. All dwarf planets and many of the smaller bodies are within theasteroid belt (between Mars's and Jupiter's orbit) and theKuiper belt (just outside Neptune's orbit).

The Solar System is within the heliosphere constantly flooded by the chargedplasma particles of thesolar wind, which forms with the interplanetary dust, gas andcosmic rays between the bodies of the Solar System aninterplanetary medium. At around70–90 AU from the Sun, the solar wind is halted by theinterstellar medium, resulting in theheliopause and the border of the interplanetary medium tointerstellar space. Further out somewhere beyond2,000 AU from the Sun extends the outermost region of the Solar System, the theorizedOort cloud, the source forlong-period comets, stretching to the edge of the Solar System, the edge of itsHill sphere, at 178,000–227,000 AU (2.81–3.59 ly), where its gravitational potential becomes equal to the galactic potential. The Solar System currently moves through a cloud of interstellar medium called theLocal Cloud. Theclosest star to the Solar System,Proxima Centauri, is 269,000 AU (4.25 ly) away. Both are within theLocal Bubble, a relatively small 1,000 light-years (ly) wide region of theMilky Way. (Full article...)

Outline of the Solar System

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Venus

Venus is the secondplanet from theSun. It is often calledEarth's "twin" or "sister" among the planets of theSolar System for its orbit being the closest to Earth's, both beingterrestrial planets, and having the most similar and nearly equal size, mass, andsurface gravity. Venus, though, is significantly different, especially as it has noliquid water, andits atmosphere is far thicker and denser than that of any other rocky body in the Solar System. The atmosphere is composed mostly ofcarbon dioxide and has a thick cloud layer ofsulfuric acid that spans the whole planet. At the mean surface level, the atmosphere reaches a temperature of 737 K (464 °C; 867 °F) and apressure 92 times greater than Earth's at sea level, turning the lowest layer of the atmosphere into asupercritical fluid. From Earth, Venus is visible as a star-like point of light,appearing brighter than any other natural point of light in the sky, and as aninferior planet it is always relatively close to the Sun, either as the brightest "morning star" or "evening star".

The orbits of Venus and Earth make the two planets approach each other insynodic periods of 1.6 years. In the course of this, Venus comes closer to Earth than any other planet, in contrast toMercury which stays closer over the course of an orbit to Earth than any other planet, due to its orbit being closer to the Sun. Ininterplanetary spaceflight from Earth, Venus is frequently used as a waypoint forgravity assists, offering a faster and more economical route. Venus has nomoons and a very slowretrograde rotation about its axis, a result of competing forces of solar tidal locking and differential heating of Venus's massive atmosphere. As a result, a Venusian day is 116.75 Earth days long, about half a Venusiansolar year, which is 224.7 Earth days long.(Full article...)

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Image 1
Hyperion
Photo credit:Cassini orbiter
Hyperion, a moon ofSaturn, is one of the largest highly irregular (non-spherical) bodies in theSolar System. Enhanced image processing was used to bring out details and color differences in this photo taken by theCassini orbiter. Hyperion is entirely saturated with deep, sharp-edgedcraters that give it the appearance of a giant sponge. Dark material fills the bottom of each crater.
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Image 2
Sunspot TRACE image
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.
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Image 3
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.
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Image 4
C/2014 Q2 (Lovejoy)
Photograph: John Vermette
C/2014 Q2 (Lovejoy) is a long-periodcomet discovered in 2014 by Australian astronomerTerry Lovejoy using a 0.2-meter (8 in)Schmidt–Cassegrain telescope. It was discovered atapparent magnitude 15 in the southern constellation ofPuppis, and is the fifth comet discovered by Lovejoy. Its blue-green glow is the result of organic molecules and water released by the comet fluorescing under the harsh UV and optical light of the sun as it passes through space.
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Image 5
Jupiter
Jupiter
Credit: Cassini probe
Jupiter is the fifthplanet from the Sun and by far thelargest within theSolar System. It is 318 times more massive than Earth, with adiameter 11 times that of Earth, and with avolume 1300 times that of Earth. Its best known feature is theGreat Red Spot, astorm larger than Earth, which was first observed byGalileo four centuries ago. This picture, taken by theCassini orbiter was one of 26 thousand images taken of Jupiter during the course of its flyby and is the most detailed global color portrait of the planet ever produced.
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Image 6
Lakes of methane onTitan
Image credit:Cassini orbiter
Thisfalse-color radar image taken by theCassini orbiter provides convincing evidence for large bodies of liquidmethane onTitan. Images taken during a fly-by of the moon on July 22, 2006 show more than 75 large bodies of liquid ranging in diameter from three to 70km (1.9 to 43.6 mi) in the moon's northern hemisphere. Intensity in this colorized image is proportional to how much radar brightness is returned. The lakes, darker than the surrounding terrain, are emphasized here by tinting regions of lowbackscatter in blue. Radar-brighter regions are shown in tan. Smallest details in this image are about 500 m (1,640 ft) across. On January 3, 2007,NASA announced that scientists have "definitive evidence of lakes filled with methane onSaturn's moon Titan."
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Image 7
Comet Hale-Bopp 29-03-1997
Comet Hale–Bopp
Credit: Philipp Salzgeber
Comet Hale–Bopp sails across the sky in the vicinity ofPazin inIstria,Croatia. To the lower right of the comet theAndromeda Galaxy is also faintly visible. Thecomet was visible to the naked eye for a record 18 months, twice as long as theGreat Comet of 1811. Atperihelion, it shone brighter than any star in the sky exceptSirius, and its two tails stretched 30-40 degrees across the sky. The passage of Hale-Bopp was notable also for inciting a degree of panic about comets not seen for decades. Rumours that the comet was being followed by analien spacecraft inspired a mass suicide among followers of theHeaven's Gate cult.
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Image 8
Moon
Photograph credit:Gregory H. Revera
TheMoon is the onlynatural satellite ofEarth and the fifth largest moon in theSolar System. Owing to itssynchronous rotation around Earth, the Moon always shows essentially the same face: itsnear side, which is marked by dark volcanicmaria, as well as the bright ancient crustal highlands and the prominentimpact craters. However, variations in the Moon's orbital speed due to itsorbital eccentricity cause alibration of several degrees of longitude; the alignment of the Moon's orbital plane causes a similar libration in latitude. The Moon was first reached in September 1959 by the Soviet Union's unmannedLuna 2, followed by the first successful soft landing byLuna 9 in 1966. The United StatesApollo program achieved the only manned lunar missions to date, includingApollo 8 in 1968, the first manned orbital mission, as well asApollo 11, the first of six manned landings between 1969 and 1972.

This picture shows the near side of the Moon close to its greatest northernecliptic latitude, so the southern craters are especially prominent.Tranquility Base, Apollo 11's landing site, is located near the mid-right in the photograph.
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Image 9
The Blue Marble
Photo credit:TheApollo 17 crew
The Blue Marble is a famous photograph ofEarth.NASA officially credits the image to the entireApollo 17 crew —Eugene Cernan,Ronald Evans andJack Schmitt — all of whom took photographic images during the mission.Apollo 17 passed overAfrica during daylight hours andAntarctica is also illuminated. The photograph was taken approximately five hours after the spacecraft's launch, whileen route to theMoon.Apollo 17, notably, was the last manned lunar mission; nohumans since have been at a range where taking a "whole-Earth" photograph such as "The Blue Marble" would be possible.
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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).
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Image 11
Mars
Photograph credit:European Space Agency
Mars is the fourth planet from the Sun and is known as the "Red Planet" due to its reddish appearance as seen from Earth. The planet is named afterMars, the Roman god of war. Aterrestrial planet, Mars hasa thin atmosphere and surface features reminiscent both of theimpact craters of the Moon and the volcanoes, valleys, deserts andpolar ice caps of the Earth. The planet has the highest mountain in theSolar System,Olympus Mons, as well as the largest canyon,Valles Marineris. Mars'srotation period and seasonal cycles are also similar to those of the Earth. Of all the planets in the Solar System other than Earth, Mars is the most likely to harbour liquid water and perhaps life. There are ongoing investigations assessing Mars's past potential forhabitability, as well asthe possibility of extant life. Future astrobiology missions are planned, includingNASA'sMars 2020 rover and theEuropean Space Agency (ESA)'sRosalind Franklin rover. In November 2016, NASA reported finding a large amount ofunderground ice in theUtopia Planitia region of the planet. The volume of water detected has been estimated to be equivalent to the volume of water inLake Superior. Mars has two moons,Phobos andDeimos, which are small and irregularly shaped.

This picture is atrue-colour image of Mars, taken from a distance of about 240,000 kilometres (150,000 mi) by theOSIRIS instrument on ESA'sRosetta spacecraft, during its February 2007 flyby of the planet. The image was generated using OSIRIS's orange (red), green and blue filters.
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Image 12
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 thefirst 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.
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Image 13
Five global views ofVenus byMagellan.
Magellan (spacecraft)
Credit: NASA/Jet Propulsion Laboratory
These images are composites of the complete radar image collection obtained by theMagellan mission. TheMagellan spacecraft was launched aboardSpace ShuttleAtlantis in May 1989 and began mapping the surface ofVenus in September 1990. The spacecraft continued to orbitVenus for four years, returning high-resolution images, altimetry, thermal emissions and gravity maps of 98 percent of the surface.Magellan spacecraft operations ended on October 12, 1994, when the radio contact was lost with the spacecraft during its controlled descent into the deeper portions of theVenusian atmosphere.
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Image 14
101955 Bennu
Photograph credit:NASA /OSIRIS-REx
101955 Bennu is acarbonaceous asteroid discovered by theLincoln Near-Earth Asteroid Research project in 1999. Bennu has a roughly spheroidal shape, an effective diameter of about 484 m (1,588 ft), and a rough, boulder-strewn surface. It is apotentially hazardous object, with a cumulative 1-in-2,700 chance of impacting Earth between 2175 and 2199. It is named after theBennu, an ancient Egyptian bird deity associated with the Sun, creation, and rebirth. This mosaic image of Bennu consists of twelve PolyCam images taken by NASA'sOSIRIS-REx spacecraft from a range of 24 km (15 mi). The primary goal of the mission is to collect a sample from the asteroid's surface, which is scheduled to take place on October 20, 2020, andreturn the sample to Earth for analysis.
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Image 15
Aurora australis
Photo: NASA/ISSExpedition 23 crew
Theaurora australis, as seen from theInternational Space Station. Aurorae are natural light displays in the sky caused by the collision of energetic charged particles with atoms in the high altitudethermosphere. The particles originate in themagnetosphere andsolar wind and, on Earth, are directed byEarth's magnetic field into the atmosphere.
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Image 16
Transit of Mercury
Photo:Mila Zinkova
Thetransit of Mercury across the face of the Sun that took place inNovember 2006.Mercury appears as a black speck in the Sun's lower center-right region; the black areas on the left and right edges aresunspots. The transit was first recorded by French astronomerPierre Gassendi on November 7, 1631. Transits of Mercury take place in May or November, at intervals of 7, 13, or 33 years, with the next one scheduled to appear inMay 2016.
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Image 17
Tranquility Base
Photograph credit:Neil Armstrong
Tranquility Base is the landing site of theApollo 11 mission on theMoon where, on July 20, 1969, humans first landed and walked on a celestial body other than the Earth. This photograph was taken at Tranquility Base byNeil Armstrong, the Apollo 11 commander, and depicts crewmemberBuzz Aldrin with scientific equipment he had just deployed on the lunar surface. In the background on the right of the image is thelunar module,Eagle; the United States flag planted at the site during the mission was blown over the next day by the exhaust of the ascent rocket.
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Image 18
Full moon
Photo credit:Luc Viatour
Full moon is alunar phase that occurs when theMoon is on the opposite side of theEarth from theSun, and when the three celestial bodies are aligned as closely as possible to a straight line. At this time, as seen by viewers on Earth, the hemisphere of the Moon that is facing the Earth (thenear side) is fully illuminated by sunlight and appears round. Only during a full moon is the opposite hemisphere of the Moon, which is not visible from Earth (thefar side), completely unilluminated.
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Image 19
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.
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Image 20
Polar map of Jupiter
Photo credit:Cassini orbiter
Thispolar map ofJupiter, taken by theCassini orbiter as itneared Jupiter during a flyby on its way toSaturn, is the most detailed global color map of the planet ever produced. The south pole is in the center of the map and theequator is at the edge. The map shows a variety of colorful cloud features, including parallel reddish-brown and white bands, theGreat Red Spot, multi-lobed chaotic regions, white ovals, and many small vortexes. Many clouds appear in streaks and waves due to continual stretching and folding by Jupiter's winds and turbulence.
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Image 21
Mars
Mars
Credit: NASA
Mars, the fourthplanet from theSun, is named after theRoman god of war because of its bloodred color. Mars has two small, oddly-shaped moons,Phobos andDeimos, named after the sons of theGreek godAres. At some point in the future Phobos will be broken up bygravitational forces. The atmosphere on Mars is 95%carbon dioxide. In 2003methane was also discovered in the atmosphere. Since methane is an unstable gas, this indicates that there must be (or have been within the last few hundred years) a source of thegas on the planet.
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Image 22
C/2011 W3 (Lovejoy)
Photograph: NASA/Dan Burbank
Comet Lovejoy is along-period comet andKreutz Sungrazer which was discovered in 2011. Named after its discoverer,Terry Lovejoy, the comet was nicknamed "The Great Christmas Comet" owing to it becoming visible near Christmas.
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Image 23
Solar eclipse of 11 August 1999
Solar eclipse of 1999 August 11
Credit: Luc Viatour
Thesolar eclipse of 1999 August 11, as seen from France. This was the most viewedtotal eclipse in human history, although some areas offered impaired visibility due to adverse weather conditions. The path of theMoon's shadow began in theAtlantic Ocean, before traversingCornwall, northernFrance, southernGermany,Austria,Hungary and northernSerbia. Its maximum was inRomania, and it continued across theBlack Sea,Turkey,Iran, southernPakistan andIndia.
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General images
The following are images from various Solar System-related articles on Wikipedia.

Image 1Simulation showing outer planets and Kuiper belt:
a) Before Jupiter/Saturn 2:1 resonance
b) Scattering of Kuiper belt objects into the Solar System after the orbital shift of Neptune
c) After ejection of Kuiper belt bodies by Jupiter
  Orbit of Jupiter
  Orbit of Saturn
  Orbit of Uranus
  Orbit of Neptune
(fromFormation and evolution of the Solar System)
Image 2Hubble image ofprotoplanetary discs in theOrion Nebula, astellar nursery approximately 25 ly across and estimated to be similar to the primordial nebula from which the Sun formed (fromFormation and evolution of the Solar System)
Image 3The orbital eccentricities and inclinations of the scattered disc population compared to the classical and resonant Kuiper belt objects (fromSolar System)
Image 4Solar system diagram byEmanuel Bowen in 1747, when neither Uranus, Neptune, nor the asteroid belts had yet been discovered. Orbits of planets are to scale, but the orbits of moons and the sizes of bodies are not. (fromSolar System)
Image 5Animations of the Solar System'souter planets orbiting. This animation is 100 times faster than the inner planet animation. (fromSolar System)
Image 6Artist's conception of thegiant impact thought to have formed theMoon (fromFormation and evolution of the Solar System)
Image 7Pierre-Simon Laplace, one of the originators of the nebular hypothesis (fromFormation and evolution of the Solar System)
Image 8Meteor Crater in Arizona. Created 50,000 years ago by an impactor about 50 metres (160 ft) across, it shows that the accretion of the Solar System is not over. (fromFormation and evolution of the Solar System)
Image 9The 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 10Overview of the inner Solar System up to Jupiter's orbit (fromSolar System)
Image 11The current Sun compared to its peak size in the red-giant phase (fromSolar System)
Image 12Diagram of the early Solar System'sprotoplanetary disk, out of which Earth and other Solar System bodies formed (fromSolar System)
Image 13Artist's conception of aprotoplanetary disk (fromFormation and evolution of the Solar System)
Image 14The current orbits ofSedna,2012 VP113,Leleākūhonua (pink), and other verydistant objects (red, brown and cyan) along with the predicted orbit of the hypotheticalPlanet Nine (dark blue) (fromSolar System)
Image 15The planets, zodiacal light and meteor shower (top left of image) (fromSolar System)
Image 16Animations of the Solar System'sinner planets orbiting. Each frame represents 2 days of motion. (fromSolar System)
Image 17Diagram of the Sun's magnetosphere and helioshealth (fromSolar System)
Image 18Relative size of the Sun as it is now (inset) compared to its estimated future size as a red giant (fromFormation and evolution of the Solar System)
Image 19Relative orbital distances in the Solar System visualized as a condensed rectangle (fromSolar System)
Image 20A color enhanced photograph from theMoon of a range of components of the Solar System. The three dots at the lower left are from left to right the planetsSaturn,Mars, andMercury, and in the middle of the picture rises theSun's corona over the darklimb of the Moon, which is from the right lit byearthshine. (fromSolar System)
Image 21The four terrestrial planetsMercury,Venus,Earth andMars (fromSolar System)
Image 22TheRing Nebula, a planetary nebula similar to what the Sun will become (fromFormation and evolution of the Solar System)
Image 23The motion of 'lights' moving across the sky is the basis of the classical definition of planets: wandering stars. (fromSolar System)
Image 24The Solar System (left) within theinterstellar medium, with the different regions and their distances on alogarithmic scale (fromSolar System)
Image 25Diagram of theLocal Interstellar Cloud, theG-Cloud and surrounding stars. As of 2022^[update], the exact position of the Solar System within the interstellar clouds remains an unresolved question in astronomy. (fromSolar System)
Image 26The Sun in true color as viewed through asolar filter (fromSolar System)
Image 27Neptune and its moonTriton, taken byVoyager 2. Triton's orbit will eventually take it within Neptune'sRoche limit, tearing it apart and possibly forming a new ring system. (fromFormation and evolution of the Solar System)
Image 28Comparison of the distances between planets, with the white bar showing orbital variations. The size of the planets is not to scale. (fromSolar System)
Image 29Orbit classification of Kuiper belt objects. Some clusters that is subjected toorbital resonance are marked. (fromSolar System)
Image 30Anartist's impression of theOort cloud, a region still well within thesphere of influence of the Solar System, including a depiction of the much further insideKuiper belt (inset); the sizes of objects are over-scaled for visibility. (fromSolar System)
Image 31Diagram of theMilky Way, with galactic features and the relative position of the Solar System labeled. (fromSolar System)
Image 32The four largest asteroids:Ceres,Vesta,Pallas,Hygiea. Only Ceres and Vesta have been visited by a spacecraft and thus have a detailed picture. (fromSolar System)
Image 33The outer planetsJupiter,Saturn,Uranus andNeptune, compared to the inner planets Earth, Venus, Mars, and Mercury at the bottom right (fromSolar System)
Image 34Allactive Solar System space probes in 2024 (and a list of upcoming ones) (fromSolar System)
Image 35Location of the Solar System within the Milky Way (fromFormation and evolution of the Solar System)
Image 36Plot of objects around theKuiper belt and other asteroid populations. J, S, U and N denotes Jupiter, Saturn, Uranus and Neptune. (fromSolar System)

Did you know –show different entries

...that the passing of theGreat Comet of 1577 (pictured) caused almost century-long debate, during whichGalileo argued that comets were merely optical illusions?

...that systematicmapping of theMichelangeloquadrangle onMercury has revealed the presence of four nearly obliterated multi-ringimpact basins, possibly the oldest features in the mapped areas of the planet?

...that there have been several proposals forspace advertising projects, including a giant, 1km²billboard visible fromEarth?

...that someastrologers claimEarth has a second moon they callLilith?

...that thesouth pole of theplanet Mercury is located in theBach quadrangle?

...that theSweden Solar System is currently the world's largestscale model of the Solar System?

...that the dominant feature in theShakespeare quadrangle is the 1300 km wideCaloris Planitia, the largest and best preservedimpact basin onMercury observed by the spacecraftMariner 10?

...that the nearly circular shape ofLukanga Swamp, a wetland covering 2,600 km² inCentral Province,Zambia, has led to speculation that it may be acrater formed by the impact of ameteorite?

More did you know...

In the news

Wikinews Space portal

Major topics

Solar System:Planets (Definition · Planetary habitability · Terrestrial planets · Gas giants · Rings) · Dwarf planets (Plutoid) · Colonization · Discovery timelineˑExploration · Moons · Planetariums

Sun:Sunspot · Solar wind · Solar flare · Solar eclipse

Mercury:Geology · Exploration (Mariner 10 · MESSENGER · BepiColombo) · Transit

Venus:Geology · Atmosphere · Exploration (Venera · Mariner program 2/5/10 · Pioneer · Vega 1/2ˑMagellan · Venus Express) · Transit

Earth:History · Geology · Geography · Atmosphere · Rotation

Moon:Geology · Selenography · Atmosphere · Exploration (Luna · Apollo8/11) · Orbit · Lunar eclipse

Mars:Moons(Phobos · Deimos) · Geology · Geography · Atmosphere · Exploration (Mariner · Mars · Viking 1/2 · Pathfinder · MER)

Ceres:Exploration (Dawn)

Jupiter:Moons(Amalthea,Io · Europa · Ganymede · Callisto) · Rings · Atmosphere · Magnetosphere · Exploration (Pioneer 10/11 · Voyager 1/2 · Ulysses · Cassini · Galileo · New Horizons)

Saturn:Moons(Mimas · Enceladus · Tethys · Dione · Rhea · Titan · Iapetus) · Rings · Exploration (Pioneer 11 · Voyager 1/2 · Cassini–Huygens)

Uranus:Moons(Miranda · Ariel · Umbriel · Titania · Oberon) · Rings · Exploration (Voyager 2)

Neptune:Moons(Triton) · Rings · Exploration (Voyager 2)

Planets beyond Neptune

Pluto:Moons(Charon,Nix,Hydra,Kerberos,Styx) · Geology · Atmosphere · Exploration (New Horizons)

Haumea:Moons(Hi'iaka,Namaka) · Ring

Quaoar:Weywot · Rings

Makemake:S/2015 (136472) 1

Gonggong:Xiangliu

Eris:Dysnomia

Sedna

Small bodies:Meteoroids · Asteroids (Asteroid belt) · Centaurs · TNOs (Kuiper belt · Scattered disc · Oort cloud) · Comets (Hale–Bopp · Halley's · Hyakutake · Shoemaker–Levy 9)

Formation and evolution of the Solar System:History of Solar System formation and evolution hypotheses · Nebular hypothesis

Bold articles arefeatured.
Italicized articles are on dwarf planets or major moons.