Astronomers used data from NASA's Great Observatories, which enabled them to carry out a detailed study of a large young galaxy cluster and they even weighed the mass of the galaxy.
The most distant galaxy cluster to be found yet has been identified by astronomers.
Eta Carinae is best known for an enormous eruptions seen in the mid-19th century. Now, scientists have found five similar objects in other galaxies for the first time.
Globular star clusters can hold a million stars in a ball that's only about 100 light-years across on average. Now, though, scientists have found that these clusters may be good places to look for space-faring civilizations.
An astrophysicist has discovered a galaxy with two black holes in which one of them is starved of stars, which is rare since black holes usually contain numerous stars.
NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) has captured the Andromeda galaxy in a new, high-energy X-ray view.
Runaway stars may actually leave "footprints" behind them in space.
Scientists may have found a new way to measure the pull of gravity at the surface of a star, which could help them find new, distant worlds.
Space and astronomy had some of the most interesting discoveries in 2015. Here are some of interesting astronomical discoveries and observations during 2015.
Researchers have captured the image of a Martian landslide along with its massive boulders
Sirius will be one of the brightest stars in the night sky on New Years.