If not in visible stars and galaxies, the most likely hiding place for the matter is in the dark space between galaxies.

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, ...

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

Astronomers capture the twinkle of a distant quasar, RX J1131, and reveal the secret size of a black hole's fiery corona.

After decades of searching, astronomers may have finally stumbled upon the first moon known to exist beyond our solar ...