NASA's next big eye on the cosmos is now fully assembled. On Nov. 25, technicians joined the inner and outer portions of the ...

The population of satellites could grow to a massive 560,000 by the end of the 2030s.

A boom in satellites is brightening the night sky and hindering astronomers’ ability to study distant galaxies, sharpening concerns over who controls access to space. Planned spacecraft launches are ...

Light from the half a million satellites that humanity is planning to launch into Earth's orbit in the coming years could ...

I would be more impressed if it was brightening periodically and beeping while it did it, because then it might be about to ...

Interstellar comet 3I/ATLAS, only the third ever seen, returns with unique composition; experts eye 19 December 2025 as a ...

NASA’s Chandra X-ray Observatory wanted to wave goodbye to autumn by releasing images of celestial spectacles.

The interstellar object 3I/ATLAS has been assigned a Level 4 rating on the Loeb-Scale, a classification that signals a combination of natural anomalies and features that meet early technosignature ...

The Geminids peak Dec. 13, producing up to 120 meteors per hour visible from 8 p.m. until sunrise. Plus, a recap of ...

NASA's Hubble Telescope has captured the explosive death throes of a star within the brilliantly glowing Calabash Nebula, providing new insights into stellar life cycles.

Hubble’s new image shows the Calabash Nebula’s dying star blasting gas at immense speeds, revealing dramatic lobes, ...