A recently discovered type of stellar explosion might fit right in among the spectrum from regular supernovae to massive gamma-ray bursts.
A census of hundreds of thousands of subgiant stars in our galaxy provides a window into the Milky Way's early history.
Astronomers have found a fast radio burst — presumably a flash from a young stellar remnant — amongst the ancient stars of a globular cluster, challenging ideas about what produces these enigmatic flashes.
The combined power of citizen science and machine learning have led to the discovery of more than 1,000 new asteroids in archival images taken by the Hubble Space Telescope.
New observations suggest a black hole 100,000 times the mass of the Sun lurks in the center of a globular cluster of the Andromeda Galaxy.
Astronomers have identified the origin of a mysterious flash that occurred three years ago.
Galaxy clusters take eons to collide. Now, astronomers have caught a pair of merging clusters in an in-between stage never seen before.
Strange behavior caught by two radio observatories may send theorists back to the drawing board.
New distances to two dwarf galaxies with unusually spread-out stars support the idea that these galaxies have little to no dark matter.
A Tibetan cosmic-ray observatory has discovered high-energy particle accelerators within our galaxy.
Much of the solar system’s interplanetary dust — seen as zodiacal light from Earth — might come from Mars.
A single high-energy neutrino may shed light on a star being swallowed by a supermassive black hole some 690 million light-years away.
Astronomers have discovered a cluster of galaxies coming together just 770 million years after the Big Bang.