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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 ...

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

Apr 3, 2013 ... Galaxy size comparison chart by astrophysicist Rhys Taylor ... which neatly illustrates the relative sizes of 25 selected galaxies using images ...

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

Apr 4, 2013 ... The M100 galaxy, which is about 60 percent larger than the Milky Way, next to the M97 galaxy. From "Galaxy Size Comparison Chart" by Rhys ...

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 ...

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 ...

oneminuteastronomer.com/5001/size-of-milky-way

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.

abyss.uoregon.edu/~js/glossary/galaxy.html

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

socratic.org/questions/how-do-galaxies-range-in-size

Jan 13, 2016 ... Galaxies can range in size from a few thousand to several hundred thousand light years across.