The four giant outer planets, meanwhile—Jupiter, Saturn, Uranus, and Neptune—were able to keep their hydrogen and helium because of their size: their gravitational pull is mighty enough to ...

Work from the DiSCo program (Discovering the Composition of Trans-Neptunian Objects) has uncovered the existence of three ...

If you’ve been tuning into Amazon’s Josh Brolin Western Outer Range, you know about the plot hole: the literal giant hole at the center of the series’ supernatural mystery. The sci-fi and ...

Your browser does not support the video element. A giant, black region of the sun — called a coronal hole — was spotted on Monday by NASA's Solar Dynamics ...