The Andromeda galaxy has been experiencing a steady decline in star formation for the past 500 million years, with a sharper decrease occurring during the last 40 million years, a new study based on ...

For years, astronomers have predicted a dramatic fate for our galaxy: a head-on collision with Andromeda, our nearest large galactic neighbor. This merger—expected in about 5 billion years—has become ...

Using the Hubble Space Telescope, astronomers have completed the most comprehensive survey of the Andromeda galaxy and created a 417-megapixel panorama. It took over a decade to make and includes more ...

The Andromeda Galaxy, or M31, isn’t just a great-looking spiral galaxy. It’s also the closest to us, which makes it visible to the naked eye from here on Earth. But the fact it’s (well, relatively) so ...

A photomosaic panorama of the Andromeda galaxy assembled over 10 years by the Hubble Space Telescope. The stunning mosaic captures the glow of 200 million stars, a fraction of Andromeda’s population.

An international team of astronomers reports the discovery of a new dwarf galaxy, which they have named Pegasus VII. The newfound galaxy, which lies about 2.4 million light years away, was identified ...