Recycling Cassiopeia A

Massive stars in our Milky Way Galaxy live spectacular lives.

Unusual Signal Suggests Neutron Star Destroyed by Black Hole

What created this unusual explosion?

Supernova Cannon Expels Pulsar J0002

What could shoot out a neutron star like a cannon ball?

Elements in the Aftermath

Massive stars spend their brief lives furiously burning nuclear fuel.

M83: The Thousand-Ruby Galaxx

Big, bright, and beautiful, spiral galaxy M83 lies a mere twelve million light-years away, near the southeastern tip of the very long constellation Hydra.

NICER at Night

Neutron star Interior Composition Explorer (NICER)

Astronomy Picture of the Day: The Lonely Neutron Star in Supernova Remnant E0102-72.3

Why is this neutron star off-center? Recently a lone neutron star has been found within the debris left over from an old supernova explosion. The "lonely neutron star" in question is the blue dot at the center of the red nebula near the bottom left

Astronomy Picture of the Day: Cosmic Collision Forges Galactic Ring

How could a galaxy become shaped like a ring?

Astronomy Picture of the Day: M1: The Crab Nebula from Hubble

This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments.

Astronomy Picture of the Day: A Plurality of Singularities at the Galactic Center

A recent informal poll found that astronomers don't yet have a good collective noun for a group of black holes, but they need one.