One hundred degrees might seem hot, when you’re sweating through your shirt in July—but on a cosmic scale it barely registers. The Sun itself is over 15 million degrees; and in a hottest-object ...

The low carbon levels are particularly interesting, as previously discovered “pristine” or metal-poor stars generally ...

In a groundbreaking study published inNature Astronomy, astronomers have identified the lowest-mass dark object ever discovered through gravitational lensing. This breakthrough provides significant ...

Black holes are places where gravity is so powerful that nothing — not even light — can escape. Rather than being empty, black holes are chock full of matter that gets squeezed into a teensy space.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

The first-ever artificial intelligence simulation of the universe seems to work like the real thing -- and is almost as mysterious.Researchers reported the new simulation June 24 in the journal ...

(CNN) — Astronomers have spied a monster radio jet in the distant universe that’s twice the width of the Milky Way galaxy. The ancient object formed when the universe was less than 10% of its current ...

Why they're black: Their gravitational pull is so extreme that even light can't escape Black holes are places where gravity is so powerful that nothing — not even light — can escape. Rather than being ...