The trans-Neptunian object Altjira, 44 times farther from the Sun than Earth is, could be the second known trinary, ...

No explosive birth needed: The discovery suggests this black hole likely formed through direct collapse, a quiet implosion ...

Today's rather aquatic-themed NASA/ESA Hubble Space Telescope image features the spiral galaxy Messier 77, also known as the ...

Astronomers are applying new image-processing techniques to previously released Hubble observations in honor of the space ...

This week was monumental for NASA’s Polarimeter to Unify the Corona and Heliosphere, or PUNCH mission. The four small satellites sent to low Earth orbit opened their eyes metaphorically for the first ...