M31
Galactic Close Call Leaves a Bridge of Gas
[/caption] An ancient passing between two nearby galaxies appears to have left the participants connected by a tenuous "bridge" of…
It’s Inevitable: Milky Way, Andromeda Galaxy Heading for Collision
Astronomers have known for years that our Milky Way and its closest neighbor, the Andromeda galaxy, (a.k.a M31) are being…
The Many Colors and Wavelengths of the Andromeda Galaxy
Andromeda is a beautiful galaxy to see with your own eyes, but in this video, ESA’s fleet of space telescopes…
Star Birth and Death in the Andromeda Galaxy
[/caption] To the naked eye, the Andromeda galaxy appears as a smudge of light in the night sky. But to…
Where’s M31’s Thick Disc?
Within our own galaxy, the thick disc is a distinct population of stars that resides above and below the main…
Stolen: Magellanic Clouds – Return to Andromeda
The Magellanic Clouds are an oddity. Their relative velocity is suspiciously close to the escape velocity of the Milky Way…
M31’s Odd Rotation Curve
Early on in astronomical history, galactic rotation curves were expected to be simple; they should operate much like the solar…
Andromeda’s Unstable Black Hole
[/caption] The Andromeda galaxy, the closest spiral galaxy to our own Milky Way, has a supermassive blackhole at the center…
Andromeda’s Double Nucleus – Explained at Last?
In 1993, the Hubble Space Telescope snapped a close-up of the nucleus of the Andromeda galaxy, M31, and found that…
Death in the Sky: M31 Shreds its Satellites
[/caption] An international team of astronomers has identified two new tidal streams in M31, the Andromeda galaxy. They are more-or-less…