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en.wikipedia.org/wiki/Galaxy

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 ( γαλαξίας), literally "milky", a reference to the Milky Way. Galaxies range in size from dwarfs with just a few hundred million (108) stars ... The space between galaxies is filled with a tenuous gas having an average ...

teacherlink.ed.usu.edu/tlnasa/reference/imaginedvd/files/imagine/docs/ask_astro/answers/001205a.html

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 ...

sites.google.com/site/coolspacefacts/facts-about-galaxies

4) Distribution of Normal Size Galaxies in Hubble Classification: Spiral-75%; Elliptical-20%; Irregular-5% (Edwin Hubble's data was skewed because spirals are ...

www.popsci.com/science/article/2013-04/cool-galaxy-size-comparison-chart

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.

www.universetoday.com/101185/how-big-are-galaxies

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 ...

physics.stackexchange.com/questions/59579/how-far-apart-are-galaxies-on-average-if-galaxies-were-the-size-of-peas-how-ma

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 ...

ned.ipac.caltech.edu/level5/PROPERTIES/dog.html

Redman [222] suggested that galaxy diameters should be operationally ... the average surface brightness contained within an ellipse of diameter D25 and axial  ...

www.quora.com/If-an-average-galaxy-is-the-size-of-a-golf-ball-how-far-would-the-next-average-sized-galaxy-be-on-average

Galaxies are not distributed randomly throughout the universe, but are grouped in gravitationaly bound clusters. These clusters are called poor or rich ...

www.quora.com/What-is-the-average-distance-between-galaxies

Depending upon which galaxies that are in consideration, the distance between two ... If an average galaxy is the size of a golf ball, how far would the next average sized galaxy be on average? Have we ever observed two ...