Supermassive black holes in the Milky Way and Andromeda will engulf each other less than 17 million years after the galaxies merge, simulations show.
New observations of Cygnus X-1 are leading astronomers to rethink what they know about stars that turn into black holes.
Knowing how frequently these stellar eruptions occur will help determine their contribution to the galaxy’s chemical makeup.
The TRAPPIST-1 and TOI-178 systems, both home to multiple bunched-up planets, have densities and orbits that defy expectations.
Gamma rays with energies approaching a quadrillion electron volts emanate from the disk of the Milky Way.
Experiments that heat crushed-up meteorites are helping astronomers understand what to look for in exoplanet atmospheres.
A distant galaxy harbors an active black hole and active star formation at the same time – an unusual coincidence.
An outburst from the super magnetic remains of a star suggests similar eruptions are behind some of the most powerful explosions in the universe.
The farthest known quasar challenges ideas about how the first supermassive black holes in the universe formed.
The probe is about to make another close pass of the sun. This time, Solar Orbiter, BepiColombo and others will be watching too.