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 ...

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

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

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 ...

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

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

A massive NASA spacecraft has set sail for Jupiter and its moon Europa. The craft named Europa Clipper will peer beneath the ...

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

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