Astronomers generally assume that active galaxies may shift and flicker, since their central supermassive black holes tend to feed in uneven and sometimes chaotic forms. Even with all that activity, ...

A remarkable new study challenges the findings of Nobel Prize-winning research into how our universe has changed over time.

As if dark energy weren't already mysterious and baffling enough, new research suggests that this unknown force may not be ...

California scientists spotted the brightest flare ever recorded, shining with the light of 10 trillion suns, from a ...