A new study has found that a hidden bias in galaxy models can skew gravitational-wave measurements of how fast the universe is expanding. That finding complicates one of astronomy’s most promising ...

The Hubble Space Telescope celebrates 36 years of incredible discoveries, stunning imagery, and a lasting impact on astronomy.

Astronomy advocacy groups are ringing alarm bells about two proposed satellite constellations, warning that they threaten to ...

Explore 25 Abandoned NASA Missions you've never heard of. Discover the untold stories of ambitious space projects canceled ...

Nearly a millennium ago, astronomers witnessed a brilliant new star blazing in the sky—a supernova so bright it was visible ...

Explore HubbleHubble HomeOverviewAbout HubbleThe History of HubbleHubble TimelineWhy Have a Telescope in Space?Hubble by the ...

And now it's 250 million miles away.

Catching a comet in the process of falling apart is difficult, but a coincidence let astronomers see one in more detail than ...

Remember when Japan sent a spacecraft to an asteroid 180 million miles away to scoop some dirt off the surface? Six years on ...

NASA chief Jared Issacman appears to be among those who support Pluto being reclassified as a planet. Could President Trump ...

Four uncrewed lunar lander missions are set for 2026, paving the way for NASA's Artemis program to return humans to the moon.

NASA will provide live coverage as two American astronauts are due to spend hours Wednesday, March 18, on a spacewalk outside ...