The precursors of heavy elements might arise in the plasma underbellies of swollen stars or in smoldering stellar corpses.

Space Why it's taking a century to pin down the speed of the universe. The Hubble constant, a set number that connects a galaxy’s speed to its distance from Earth and tells us how fast the ...

If dark matter is made of axions or similar ultralightweight particles, then merging galaxies and clusters may form axion "stars" at their centers that astronomers might be able to detect.

In space, no one can hear a pin drop. Richard Branson’s Virgin Galactic was forced to ground its rocket after a part fell off during its first space tourism flight of 2024.

The pin was located on the underbelly of Virgin Galactic’s mothership, called VMS Eve, which is a twin-fuselage plane designed to carry the space plane, VMS Unity, under its wings to a high ...