The Hubble Space Telescope, one of the most productive scientific observatories ever launched, is in a gradual but inevitable ...

Some stars appear to defy time itself. Nestled within ancient star clusters, they shine bluer and brighter than their neighbors, looking far younger than their true age. Known as blue straggler stars, ...

The idea sounds simple enough when reduced to its basics. Put reflective surfaces in orbit and redirect sunlight back to Earth after sunset. A Califor.

Optical proof of a tiny companion orbiting supergiant star Betelgeuse is hard to come by. Hubble just spotted new evidence.

New Hubble Space Telescope imagery of the Saturn show it's 'ring spokes' in orbit around the gas giant planet. Credit: ...

The 21st century is featuring a second space age that is increasingly private.

Mock observations test the performance of the Chinese Space Station Telescope as the 2-meter-class observatory moves closer ...

Interstellar comet 3I/ATLAS is now a test of comet physics because its jets are well-organized when many would think they ...

"Until now, it was unknown what type of star would remain after the merger." ...

China’s Xuntian space telescope completed a full performance simulation, confirming operational readiness for its planned ...

NASA Administrator Jared Isaacman appeared to suggest that space shuttle Discovery may not be relocated to Houston's Johnson ...