galaxies

A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and, dark matter, an important but poorly understood component.[1][2] The word galaxy is derived from the Greek galaxias (γαλαξίας), literally "milky", a reference to the Milky Way. Examples of galaxies range from dwarfs with as few as ten million (107) stars[3] to giants with a hundred trillion (1014) stars,[4] each orbiting their galaxy's own center of mass.

For more information about galaxies check the Wikipedia article here

ZME Science posts about galaxies

Superhot filaments of gas connect galaxy clusters

Wed, Nov 21, 2012

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Astronomers have for the  first time confirmed a bridge of hot gas with a temperature of about 80 million degrees Kelvin connecting a pair of galaxy clusters 10 million light-years apart. The discovery is of particular importance since it might help shed light on the missing baryonic matter that has been puzzling scientists for decades. The [...]

The Sombrero Galaxy is actually made up of two galaxies in one, infrared survey finds

Thu, Apr 26, 2012

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Astronomers classify galaxies into three basic types: elliptical (flat, elongated shape), spiral (most easily recognizable and common – described by their disk shape and outward spiraling arms) and irregular (usually described by a irregular shape, typical to very young galaxies). One of the most fascinating galaxies known to man is the Sombrero galaxy, shaped like a hat [...]

Ancient Galaxies Really Sucked (Gas, That Is)

Thu, Oct 14, 2010

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When early galaxies formed, there was a surprisingly high rate of new stars being formed, which was explained by major galactic collisions; however, recent evidence suggests that in fact the answer is much simpler, and not nearly as violent. Astronomers using the European Southern Observatory’s Very Large Telescope in Chile have observed three ancient galaxies [...]

Amazing NASA pic shows how galaxies collide

Fri, Aug 6, 2010

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I gotta say, this is one of the most beautiful pictures I’ve seen all year ! This amazing image released by NASA shows a collision betweet two galaxies that began 100 million years ago (when dinosaurs were still kings) and is still happening today. The bright sources you see are in fact produced by huge [...]

Hubble Back In Business: Pair Of Gravitationally Interacting Galaxies

Mon, Nov 3, 2008

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A while ago we were a bit worried about the future of Hubble, but it seems the people at NASA managed to once again do an amazing job, so the most well known telescope is back in business, and up to big things actually. Just a few days after it was brought back online, it [...]

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