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Highlights
European
Southern
Observatory
Cerro Paranal and the Milky Way above it
eso2602 — Press Release
AES Andes announces cancellation of INNA, the industrial complex planned near Paranal
AES Andes announced that it will step back from the megaproject INNA, planned to be located near the European Southern Observatory’s (ESO’s) Paranal Observatory. ESO welcomes this announcement and expects that the project will be withdrawn from Chile's Environmental Assessment Service (SEA) soon, which would formally confirm INNA is not going ahead.
VLT image of a dead star creating a shock wave as it moves through space
eso2601 — Press Release
Astronomers surprised by mysterious shock wave around dead star
Gas and dust flowing from stars can, under the right conditions, clash with a star’s surroundings and create a shock wave. Now, astronomers using the European Southern Observatory’s Very Large Telescope (ESO’s VLT) have imaged a beautiful shock wave around a dead star — a discovery that has left them puzzled. According to all known mechanisms, the small, dead star RXJ0528+2838 should not have such structure around it. This discovery, as enigmatic as it’s stunning, challenges our understanding of how dead stars interact with their surroundings.
CTAO-South time-capsule monument unveiling
eso2521 — Press Release
Construction begins on the first and largest gamma-ray observatory in Chile
Yesterday, a groundbreaking ceremony for the CTAO’s southern array facility took place at the European Southern Observatory’s (ESO’s) Paranal site in Chile, marking the beginning of construction of the telescope foundations. The CTAO, or Cherenkov Telescope Array Observatory, will be the world’s largest and most powerful gamma-ray observatory, providing new insights into the high-energy Universe. Its southern array will be the first gamma-ray observatory to be built in Chile.
Artist’s impression of the initial shape of a supernova explosion
eso2520 — Press Release
Unique shape of star’s explosion revealed just a day after detection
Swift observations with the European Southern Observatory’s Very Large Telescope (ESO’s VLT) have revealed the explosive death of a star just as the blast was breaking through the star’s surface. For the first time, astronomers unveiled the shape of the explosion at its earliest, fleeting stage. This brief initial phase wouldn’t have been observable a day later and helps address a whole set of questions about how massive stars go supernova.
Four lasers for the VLTI
eso2519 — Press Release
Laser trial run kickstarts new era of interferometry
Last week, four lasers were projected into the skies above the European Southern Observatory’s (ESO’s) Paranal site in Chile. The lasers are each used to create an artificial star, which astronomers use to measure and then correct the blur caused by Earth's atmosphere. The striking launch of these lasers, one from each of the eight-metre telescopes at Paranal, is a significant milestone of the GRAVITY+ project — a large and complex upgrade to ESO’s Very Large Telescope Interferometer (VLTI). GRAVITY+ unlocks a greater observing power and a much wider sky coverage for the VLTI than previously possible.
The RCW 94/95 nebulae in visible and infrared light
eso2518 — Press Release
New image captures spooky bat signal in the sky
A spooky bat has been spotted flying over the European Southern Observatory’s (ESO’s) Paranal site in Chile, right in time for Halloween. Thanks to its wide field of view, the VLT Survey Telescope (VST) was able to capture this large cloud of cosmic gas and dust, whose mesmerising appearance resembles the silhouette of a bat.
Andreas Kaufer at Paranal
eso2517 — Press Release
Andreas Kaufer appointed as next ESO Director General
The Council of the European Southern Observatory (ESO) has appointed Andreas Kaufer to be the new ESO Director General. Kaufer, who is currently ESO Director of Operations, will succeed Xavier Barcons, who will remain as Director General until the end of August 2026.
4MOST at VISTA
ann25007
Thousands of eyes on the sky: 4MOST sees first light
Illustration of the rogue planet Cha 1107-7626
eso2516 — Press Release
Six billion tonnes a second: Rogue planet found growing at record rate
Astronomers have identified an enormous ‘growth spurt’ in a so-called rogue planet. Unlike the planets in our Solar System, these objects do not orbit stars, free-floating on their own instead. The new observations, made with the European Southern Observatory’s Very Large Telescope (ESO’s VLT), reveal that this free-floating planet is eating up gas and dust from its surroundings at a rate of six billion tonnes a second. This is the strongest growth rate ever recorded for a rogue planet, or a planet of any kind, providing valuable insights into how they form and grow.
Artist’s impression of Hayabusa2 touching down on asteroid 1998 KY26
eso2515 — Press Release
Can Hayabusa2 touchdown? New study reveals space mission’s target asteroid is tinier and faster than thought
Astronomers have used observatories around the world, including the European Southern Observatory's Very Large Telescope (ESO’s VLT), to study the asteroid 1998 KY26, revealing it to be almost three times smaller and spinning much faster than previously thought. The asteroid is the 2031 target for Japan’s Hayabusa2 extended mission. The new observations offer key information for the mission’s operations at the asteroid, just six years out from the spacecraft’s encounter with 1998 KY26.
GRB 250702B, an unusually long and repeating gamma-ray burst
eso2514 — Press Release
Astronomers spot mysterious gamma-ray explosion, unlike any detected before
Astronomers have detected an explosion of gamma rays that repeated several times over the course of a day, an event unlike anything ever witnessed before. The source of the powerful radiation was discovered to be outside our galaxy, its location pinpointed by the European Southern Observatory’s Very Large Telescope (VLT). Gamma-ray bursts (GRBs) are the most powerful explosions in the Universe, normally caused by the catastrophic destruction of stars. But no known scenario can completely explain this new GRB, whose true nature remains a mystery.
European
Southern
Observatory

Our Stories

AllPress ReleasesAnnouncementsPictures of the WeekBlog PostsVideos
How CTAO will see the high-energy Universe | ESO Chasing Starlight
Video
18 Dec 2025 — eso2521a
How CTAO will see the high-energy Universe | ESO Chasing Starlight
The Milky Way’s glistening band
Picture of the Week
16 Feb 2026 — potw2607
The Milky Way’s glistening band
The marvels of Paranal
Picture of the Week
9 Feb 2026 — potw2606
The marvels of Paranal
Ministra federal de Investigación, Tecnología y Espacio de Alemania y ministro de Ciencia y Arte del Estado de Baviera en Paranal
Announcement
6 Feb 2026 — annlang26002-es-cl-en
German Federal Minister of Research, Technology and Space, German dignitaries visit ESO’s Paranal Observatory
Keeping the Extremely Large Telescope's mirrors shiny
Video
5 Feb 2026 — eltu_Large-Coating-Plant
Keeping the Extremely Large Telescope's mirrors shiny
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