Astronomers have sent x-ray telescopes into orbit to scan the sky, to catch the first x-ray afterglow of a burst as soon as possible. The latest of these satellites, called Swift, has been making ...

This is the clearest image yet of the faint afterglow from the Big Bang, known as the cosmic microwave background radiation (half-sky image on the left, closeup on the right). Orange and blue ...

All of these signs suggest that the object is the afterglow of a now-dormant black hole ... "This object covers a large area in the sky, which makes it a bit easier to get in-depth images of," Shapiro ...