Andromeda is also a flattened spiral like the Milky Way, but it's twice as large — 220,000 light-years across versus 105,000 for the Milky Way — and crammed with a trillion suns. Can you even begin to ...
A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding ...
On a clear night, the Milky Way and the Andromeda galaxy look like close neighbors. In space, they really are.
For years, astronomers have observed the strange motion of Andromeda, the Milky Way’s closest large galactic neighbor. While ...
While the appearance of Andromeda is not a once-in-a-lifetime event, it’s rare for someone to come across it at the right time and record it in a photograph.
New infrared observations reveal that the rare interstellar visitor known as comet 3I/ATLAS has dramatically brightened ...