
'Dark subhaloes' may explain why galaxies seem to form pre-determined shapes
Our universe is full of mysteries, but few are as perplexing as the dark, tiny galaxies that hover around larger ones like the Milky Way.

By Hanneke Weitering last updated
On April 19, 1971, the Soviet Union launched the world's first space station, Salyut 1.

By Julian Dossett published
For a few moments on April 6, the four Artemis 2 moon astronauts and the three crewmates aboard China's Tiangong space station were farther away from each other than any humans had ever been.

By Mike Wall published
The heat shield on Artemis 2's Orion capsule appears to have held up incredibly well during its scorching downward trip through Earth's atmosphere, mission commander Reid Wiseman said.

By Josh Dinner published
The Artemis 2 astronauts said they gained a deeper understanding of their Orion capsule during their moon mission — and what they learned bodes well for future Artemis flights.

By Tariq Malik, Daisy Dobrijevic last updated
Reference See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2026.

By Robert Lea published
Scientists have used a synthetic universe to observe how the first galaxies evolved and grew. In fact, it is so close to the real thing that it's tricking some astronomers.

By Brett Tingley published
NASA's Space Launch System rocket was back on the move overnight ahead of its second mission to the moon, which will be the first time the vehicle carries a crew.

By Fran Ruiz published
Capcom's new IP is a welcome throwback to simpler action games, but its story and themes are shockingly well-timed and refreshingly optimistic.

By Space.com Staff published
On Episode 206 of This Week In Space, Rod Pyle and Tariq Malik are joined by Dr. Brianne Suldovsky of Portland State University to discuss what happens after the discovery of an alien life form.

The latest aurora forecast for tonight help you make sure you're in the right place at the right time to see the northern lights.

Follow Space.com's rocket launch blog for the latest on when the next rocket launch will be and how to follow it live.

Find out what you can see in the night sky for tonight, from planets and stars to dazzling meteor showers.

Witness live views of Earth from the International Space Station as it orbits the planet. Space streaming company Sen is broadcasting 24/7 from the ISS in beautiful 4K HD.

NASA astronaut Sally Ride became the first American woman in space aboard the space shuttle Challenger.

See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2025.

Keep up with all the rocket launches, astronomical events and mission milestones for 2025 with our space calendar.

By Leonard David published
How would people react if an alien civilization actually made contact with us? Space.com talked to experts, who shared a variety of opinions about a possible real-life "disclosure day."

By Leonard David published
A civilization capable of interstellar travel may also be one that has moved beyond conquest, excess and ecological self-destruction — and it therefore may not want to talk to us.

By Leonard David published
"They are truly ready for long duration space flights and lunar habitation."
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