All these planetary finds, of which there are now over 5,700 confirmed discoveries, help us grasp what's out there — and ...

Using the Gaia space telescope, astronomers have observed 55 massive stars ejected from their home star cluster in the Large ...

The Hubble Space Telescope has seen Jupiter's Great Red Spot oscillating in width as it drifts around the planet. Could this ...

The sparkling scene depicted in this NASA/ESA Hubble Space Telescope image is of the spiral galaxy NGC 5248, located 42 ...

Estimates of how fast the universe is expanding disagree. Could a new form of dark energy resolve the problem?

Scientists identify faint black holes in galaxies that formed during the early days of the universe, using imagery from the ...

NASA's Europa Clipper spacecraft lifted off Monday from Kennedy Space Center in Florida aboard a SpaceX Falcon Heavy rocket, ...

NASA’s Europa Clipper, the largest robotic probe the agency has ever built, rocketed into space Monday on a mission to ...

Coverage of the launch is expected to begin at 11 a.m. ET and will be added to this story in the video player above. The ...

NASA's Hubble Space Telescope and New Horizons Pluto probe have teamed up to image the ice giant Uranus, which will help ...