Archives for the 'galaxies' Category
The Virgo Cluster
Published on 30 Mar 2007 at 10:38 pm.
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It’s galaxy season! This time of year, shortly after sunset, when you look up, you are looking out of the Milky Way. That means that you can see galaxies. This is true at other times of the year, of course. But, at this time of year, you can look towards the […]
UGC 3697
Published on 12 Feb 2007 at 1:03 pm.
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Located in Camelopardalis (high in the sky in the northern hemisphere right now) is a galaxy with the designation UGC 3697 (from the Uppsala General Catalog of Galaxies). This is one of the few galaxies also to have a proper name: The Integral Sign Galaxy. The name is obviously due to the […]
BL Lacertae
Published on 4 Dec 2006 at 4:28 pm.
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Filed under active galaxies, galaxies.
This time of year, high overhead about sunset for observers in the Northern Hemisphere is the constellation Lacerta. The constellation Lacerta is supposed to be a lizard. It is a rather underwhelming constellation, with no really bright stars. However, Lacerta is home to a number of interesting objects. One of these is BL Lacertae.
The name […]
NGC 1132
Published on 19 Oct 2006 at 7:53 pm.
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Now this will be my last post on galaxies for a while, I think. Y’all will probably be glad for me to move on. But I thought that I’d say one more thing about galaxy collisions.Â
After the Milky Way and Andromeda Galaxies collide and merge, then they’ll also eat the other smaller galaxies nearby. Eventually, […]
The coming collision
Published on 18 Oct 2006 at 5:52 pm.
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In my last post, I mentioned that the Andromeda Galaxy and the Milky Way would one day collide. That day is only about 3 or 4 billion years into the future. You can’t really nail it down to a particular day, because galaxies are pretty big. How do you define just when the collision is? […]
The Local Group
Published on 16 Oct 2006 at 7:07 pm.
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Continuing on my series of postings about galaxies, this time I’ll talk about the Local Group. Edwin Hubble, himself, was the first to determine that our Milky Way Galaxy is part of a small group of galaxies. Our little group of galaxies is far too small to really be a cluster, so we call it […]
Galaxy Clusters
Published on 15 Oct 2006 at 11:25 pm.
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My last post was about galaxies and the Hubble galaxy classification system. Today, I’m posting more about galaxies. This time, I’ll talk about clusters of galaxies.
Galaxies are seldom found isolated. The vast majority of galaxies are found in clusters and groups. Galaxy clusters come in all sizes and concentrations. Some […]
