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 (
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 ...
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 ...
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)!
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. 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
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?
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 ...
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.