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A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias ( γαλαξί...

How Big Are Galaxies? - Universe Today


Apr 3, 2013 ... Yet the results for galaxies are useless. Not only do you not get any size comparisons, but scroll down even just a page and you get images of ...

How far apart are galaxies on average? If galaxies were the size of ...


Mar 31, 2013 ... The simple answer is that the average galaxy spacing is around a few megaparsecs, while the biggest galaxies are around 0.1 megaparsecs in ...

Cosmology - Galaxies - Astronomy Online


Giant elliptical galaxies are very rare and can be 20 times the size of any ... The average number of stars in a spiral galaxy is about 100 billion (billion with a b)!

A Neat Trick to Understand the Size of the Galaxy - One-Minute ...


Dec 5, 2011 ... A Neat Trick to Understand the Size of the Galaxy ... inch away, then Jupiter would lie 5.2 inches away and Pluto an average of 40 inches away.

Normal Galaxies - Cool Cosmos


Normal Galaxies. Galaxies are huge collections of stars, dust and gas. They usually contain several million to over a trillion stars and can range in size from a  ...

Ask an Astrophysicist: Milky Way and other Galaxies


How large is the Milky Way galaxy? (Submitted ... What is our Sun's rate of speed in relation to the center of our galaxy? ..... What is the average size of a galaxy?

The evolution of galaxy sizes


Dec 13, 2012 ... We find that, once the progenitor bias due to the relation between galaxy size and stellar age is removed, the average amount of size evolution ...

3D-HST+ CANDELS: The Evolution of the Galaxy Size-Mass ...


Apr 10, 2014 ... ... on average smaller than late-type galaxies at all redshifts, and find a significantly different rate of average size evolution at fixed galaxy mass, ...



Galaxies vary considerably in size, composition, and structure, but nearly all of them ... Spiral galaxies are generally subdivided into "normal" and "barred" types.

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Facts About Galaxies - Cool Space Facts - Sites - Google


Here is some facts about galaxies!! 1) Main Types of Galaxies: 3;. Spiral; Elliptical ; Irregular (Ellipticals and Irregulars exist in both normal and 'dwarf' sizes).

Average galaxy size - TeacherLINK


The Question. (Submitted December 05, 2000). What is the average size of a galaxy? The Answer. Thank you for your question. Our Milky Way galaxy is a pretty ...

The Size Of The Milky Way Galaxy, Shown To Scale | Popular Science


Apr 4, 2013 ... From "Galaxy Size Comparison Chart" by Rhys Taylor ... It's puny compared to M87, an elliptical galaxy 980,000 light years in diameter.