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 ...

Portal operates an 8,000-square-foot spacecraft development and testing facility in Bothell, where it’s building its ...

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

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