Astrophysics

Galaxies, Robotic Spaceflight

Cool new views of Andromeda Galaxy

Science

A cosmic-ray impact

Galaxies

Stellar effervescence on display

Exotic Objects

Baffling pulsar leaves astronomers in the dark

Solar System

Did an eighth-century gamma-ray burst irradiate Earth?

Galaxies

Galaxy’s gamma-ray flares erupted far from its black hole

Galaxies, Robotic Spaceflight

GALEX reveals the largest-known spiral galaxy

Exotic Objects, Robotic Spaceflight, Stars

The farthest supernova yet for measuring cosmic history

Deep-Sky Objects, Stars

Radio telescopes give clues to structure, history of the Milky Way

Exotic Objects, Robotic Spaceflight

NuSTAR catches black holes in galaxy web

Exotic Objects, Galaxies

Massive outburst in neighbor galaxy surprises astronomers

Galaxies, Milky Way

Galactic geysers fueled by star stuff