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

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 ...

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

NASA's Chandra X-ray space telescope has spotted the cosmic serial killer that, like Michael Myers, is back for a sequel, ...

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

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

A spacecraft that will hunt for signs of alien life on one of Jupiter’s icy moons has blasted off from Cape Canaveral, ...

A pair of quasars that existed when the universe was only 3 billion years old has been spotted by the Hubble Space Telescope.

See composite views of the Cartwheel Galaxy captured by the James Webb Space Telescope. The galaxy is 500 million light years ...

Scientists have discovered that the Great Red Spot of Jupiter undergoes a rhythmic 90-day cycle of changes, offering fresh ...

Hubble’s High-Definition Panoramic View of the Andromeda Galaxy| NASA has released the largest image ever captured by the ...