A compound lens forged by two galaxies is helping astronomers get a bead on the Hubble Constant and dark energy.

An international team led by researchers in Japan and Europe has discovered a new multi-planet system around a sun-like star, ...

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile have discovered "signs of a ‘hot spot’ orbiting Sagittarius A*," according to the European Southern Observatory (ESO) ...