"It is larger than the size of most anything to which it might be compared." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The universe's ...

The Sun’s most violent flares are turning out to be even more extreme than I, or many solar physicists, had imagined. By ...

Astronomers at the University of North Carolina at Chapel Hill have helped uncover new clues about the longest-lasting cosmic explosion ever observed, a gamma-ray burst that lasted nearly seven hours.

The longest gamma-ray burst ever recorded did not behave like a quick cosmic flash. Instead, it burned across the sky for more than seven hours, forcing astronomers to rethink what powers the universe ...