The space of night is infinite,
The blackness and emptiness
Crossed only by thin bright fences
Of logic

— Kenneth Rexroth
"Theory of Numbers"

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Updated: 1 day 55 min ago

ACES: time to get ready

Tue, 03/25/2025 - 7:00am
Image: ESA's Atomic Clock Ensemble in Space at NASA's Kennedy Space Center
Categories: Astronomy

Webb unmasks true nature of the Cosmic Tornado

Mon, 03/24/2025 - 10:00am

The NASA/ESA/CSA James Webb Space Telescope has captured a beautiful juxtaposition of the nearby protostellar outflow known as Herbig-Haro 49/50 with a perfectly positioned, more distant spiral galaxy. Due to the close proximity of this Herbig-Haro object to Earth, this new composite infrared image of the outflow from a young star allows researchers to examine details on small spatial scales like never before. With Webb, we can better understand how the jet activity associated with the formation of young stars can affect the environment surrounding them.

Categories: Astronomy

Introducing the new ESA's hyper performance computing

Fri, 03/21/2025 - 11:00am
Video: 00:02:46

The high-performance computing (HPC) environment will be available for scientific research and technological development activities, supporting all ESA programmes as well as the researchers and small- and medium-enterprises from Member States.

Categories: Astronomy

Week in images: 17-21 March 2025

Fri, 03/21/2025 - 10:15am

Week in images: 17-21 March 2025

Discover our week through the lens

Categories: Astronomy

Andrea Patassa | Astronaut Reserve Member, Test Pilot, Spiderman? | ESA Explores #11

Fri, 03/21/2025 - 9:00am
Video: 00:09:13

Meet Andrea Patassa—test pilot, aviator, passionate outdoor adventurer, and Member of ESA’s Astronaut Reserve. 

In this miniseries, we take you on a journey through the ESA Astronaut Reserve, diving into the first part of their Astronaut Reserve Training (ART) at the European Astronaut Centre (EAC) near Cologne, Germany. Our “ARTists” are immersing themselves in everything from ESA and the International Space Station programme to the European space industry and institutions. They’re gaining hands-on experience in technical skills like spacecraft systems and robotics, alongside human behaviour, scientific lessons, scuba diving, and survival training. 

ESA’s Astronaut Reserve Training programme is all about building Europe’s next generation of space explorers—preparing them for the opportunities of future missions in Earth orbit and beyond. 

This interview was recorded in November 2024. 

You can also listen to this episode on all major podcast platforms

Keep exploring with ESA Explores

Categories: Astronomy

Inner space engineering

Fri, 03/21/2025 - 8:50am
Image: Inner space engineering
Categories: Astronomy

Earth from Space: Land of giants

Fri, 03/21/2025 - 5:00am
Image: The Copernicus Sentinel-2 mission takes us over the Sequoia and Kings Canyon National Parks in California’s Sierra Nevada mountains.
Categories: Astronomy

332nd ESA Council: Media information session

Thu, 03/20/2025 - 10:00am
Video: 00:34:08

Watch the media information session in which ESA Director General Josef Aschbacher and ESA Council Chair Renato Krpoun (CH) update journalists on the key decisions from the ESA Council meeting, held at ESA Headquarters in Paris on 19 and 20 March 2025.

Categories: Astronomy

Read ESA's Strategy 2040

Thu, 03/20/2025 - 9:00am

ESA's Strategy 2040

Read the Five Goals

Categories: Astronomy

Euclid opens data treasure trove, offers glimpse of deep fields

Wed, 03/19/2025 - 7:00am

On 19 March 2025, the European Space Agency’s Euclid mission released its first batch of survey data, including a preview of its deep fields. Here, hundreds of thousands of galaxies in different shapes and sizes take centre stage and show a glimpse of their large-scale organisation in the cosmic web.

Categories: Astronomy

Euclid is back – 26 million galaxies and counting

Wed, 03/19/2025 - 7:00am
Video: 00:06:44

The European Space Agency’s Euclid mission has scouted out the three areas in the sky where it will eventually provide the deepest observations of its mission.

In just one week of observations, with one scan of each region so far, Euclid already spotted 26 million galaxies. The farthest of those are up to 10.5 billion light-years away.

In the coming years, Euclid will pass over these three regions tens of times, capturing many more faraway galaxies, making these fields truly ‘deep’ by the end of the nominal mission in 2030.

The first glimpse of 63 square degrees of the sky, the equivalent area of more than 300 times the full Moon, already gives an impressive preview of the scale of Euclid’s grand cosmic atlas when the mission is complete. This atlas will cover one-third of the entire sky – 14 000 square degrees – in this high-quality detail.

Explore the three deep field previews in ESASky:

-          Euclid Deep Field South

-          Euclid Deep Field Fornax:

-          Euclid Deep Field North:

Read more: Euclid opens data treasure trove, offers glimpse of deep fields

Categories: Astronomy

ESA Impact: Top 2025 space photos so far

Tue, 03/18/2025 - 5:00am

ESA Impact: Top 2025 space photos so far

Categories: Astronomy

Biomass out of the box

Mon, 03/17/2025 - 7:25am
Image: Biomass out of the box
Categories: Astronomy

Week in images: 10-14 March 2025

Fri, 03/14/2025 - 10:15am

Week in images: 10-14 March 2025

Discover our week through the lens

Categories: Astronomy

Follow the reveal of Euclid’s first catalogue on 19 March

Fri, 03/14/2025 - 5:00am

The European Space Agency is releasing the first catalogue of astronomical data from the Euclid space telescope, including three new enormous image mosaics with zoom-ins. Follow the reveal live on Wednesday 19 March at 11:00 BST / 12:00 CET.

Categories: Astronomy

Earth from Space: Halong Bay, Vietnam

Fri, 03/14/2025 - 5:00am
Image: This Copernicus Sentinel-2 image showcases striking rocky formations amid the blue waters of Halong Bay in northeast Vietnam.
Categories: Astronomy

Images from Hera’s Mars flyby (Official broadcast)

Thu, 03/13/2025 - 10:30am
Video: 01:08:00

Watch the replay of our Hera mission Mars flyby event. On 12 March 2025, ESA’s Hera mission came to within 5000 km of the surface of the red planet and 300 km of Mars’s more distant and enigmatic moon Deimos. During this flyby, Hera performed observations of both Mars and the city-sized Deimos. Hera then needed to swing its High Gain Antenna back to Earth to transmit its data home. On Thursday, 13 March, these images were premiered by Hera’s science team from ESA’s ESOC mission control centre in Darmstadt, Germany, explaining what they reveal, during our public webcast starting at 11:50 CET. The team was joined by ESA astronaut Alexander Gerst and renowned science fiction writer Andy Weir, author of The Martian and Project Hail Mary, as well as a surprise special guest!

Categories: Astronomy

Hera asteroid mission spies Mars’s Deimos moon

Thu, 03/13/2025 - 6:59am

While performing yesterday’s flyby of Mars, ESA’s Hera mission for planetary defence made the first use of its payload for scientific purposes beyond Earth and the Moon. Activating a trio of instruments, Hera imaged the surface of the red planet as well as the face of Deimos, the smaller and more mysterious of Mars’s two moons.

Categories: Astronomy

ESA’s NavLab on wheels: an Arctic mission

Thu, 03/13/2025 - 5:02am

High above the Arctic Circle, on the rugged terrain of Andøya, three ESA radionavigation engineers take a rare moment to unwind with a game of shuffleboard. Outside, sheep graze under the shimmering northern lights, a serene backdrop to their demanding mission: test how navigation technologies withstand interference signals. With 100TB of data collected over 5 days, their efforts promise to strengthen the reliability of satellite navigation for the benefit of us all.

Categories: Astronomy

Extended space dive

Thu, 03/13/2025 - 4:10am

European scientists are asking volunteers to lie down on a waterbed for 10 days as part of a pioneering dry immersion study to recreate some of the effects of spaceflight on the body.

Categories: Astronomy