For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star ...

The early universe was already warm before reionization, revealing that the first stars did not flicker on in an icy cosmos.

Astronomers have captured the most detailed view yet of a red supergiant star just before it exploded, hidden beneath layers ...