galaxies
Galaxy Growth Not Always Result of Violent Collisions
[/caption] Until recently, it was thought the galactic equivalent of a motorway pile-up was the only way galaxies got bigger.…
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…
Milky Way Sidelined in Galactic Tug of War
[/caption] From a Harvard-Smithsonian Center for Astrophysics press release: The Magellanic Stream is an arc of hydrogen gas spanning more…
Astronomy Without A Telescope – Not So Ordinary
[/caption] Sorry - a bit of southern sky bias in this one. But it does seem that our favourite down…
The Case of the Missing Bulges
The Hubble sequence is astronomer's main tool for classifying galaxies. On one side, you have elliptical galaxies with defined structure.…
Planck, XMM Newton Find New Galaxy Supercluster
[/caption] Scanning the sky in microwaves, the Planck mission has obtained its very first images of galaxy clusters, and found…
The Hercules Satellite – A Galactic Transitional Fossil
[/caption] On Friday, I wrote about the population of the thick disk and how surveys are revealing that this portion…
The Thick Disk: Galactic Construction Project or Galactic Rejects?
[/caption] The disk of spiral galaxies is comprised of two main components: The thin disk holds the majority of stars…
Spiral Galaxies Could Eat Dwarfs All Across the Universe
[/caption] For years, astronomers have seen evidence that – at least in our own local neighborhood -- spiral galaxies are…
The Black Hole/Globular Cluster Correlation
[/caption] Often in astronomy, one observable property traces another property which may be more difficult to observe directly; X-ray activity…