The interstellar comet 3I/ATLAS, a rare visitor from outside the Solar System, might have been spewing gases for months ...

Every 378 days, Saturn swings into opposition, bringing it closer, brighter, and nearly 10 times easier to observe than at ...

Westerlund 1, the biggest and closest "super" star cluster to Earth, dazzles in this image released on July 23, 2025. This ...

Dark energy —the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the universe's greatest mysteries ...

X-ray: NASA/CXC/SAO; Optical: NASA/ESA/STScI; IR: NASA/ESA/CSA/STScI; Processing: NASA/CXC/SAO/L. Frattare ...