Astronomers have identified a new kind of cosmic explosion extreme nuclear transients so powerful they outshine typical ...

Using NASA's Chandra spacecraft and ESA's XMM-Newton satellite, astronomers have investigated the galaxy NGC 7793, searching ...

This serene spiral galaxy hides a cataclysmic past. The galaxy IC 758, shown in this NASA/ESA Hubble Space Telescope image, ...

Nearby supernova blasts may have severely altered Earth’s climate history Tree rings reveal spikes in carbon-14 from ancient ...

Ancient supernovas may have blasted Earth with powerful radiation, causing dramatic changes in our climate, and could do so ...

When a star explodes, it sends high-energy particles out in all directions. This burst of energy can travel through space for ...

Portal Space Systems will set up a 50,000-square-foot spacecraft manufacturing facility near its design and testing hub in Bothell, Wash.