A group of international astronomers have discovered three mysterious, ultra-massive galaxies in the early universe. The ...

The Chandra X-ray Observatory is the darling of high-energy astrophysics. Famed for providing unequaled x-ray views of ...

The goal of the Parker Solar Probe mission is to investigate the mysteries of the sun's corona, its outer atmosphere. What ...

“We have a top-notch telescope that is well aligned and has great optical performance at the cold temperatures in space,” ...

It all started with a Big Bang – and now scientists are on a quest to unravel the mystery behind the birth of the universe.

If another gravity theory is correct, "then the broader implications are enormous," astrophysicist Stacy McGaugh told ...

Hollywood has made a cottage industry out of imagining biological space aliens, but if intelligent life is out there it’s ...

NASA's Roman Space Telescope has received its Optical Telescope Assembly, paving the way for its mission to explore the ...

NASA is uncovering the mysteries of dark matter and dark energy, which make up most of the universe. What are these forces?

Launching by 2025, NASA’s SPHEREx mission will map hundreds of millions of galaxies in 102 infrared colors to investigate the ...

"Excessive secrecy has led to grave misdeeds against loyal civil servants, military personnel and the public — all to hide ...