The Size of Stars

"HST imaging found that Betelgeuse is one of the largest stars, almost the size of our whole solar system." http://www.oglethorpe.edu/faculty/~m_rulison/astronomy/chap%2017/chapter_17_lecture_notes.htm
http://earthsky.org/brightest-stars/betelgeuse-will-explode-someday
http://blogs.discovermagazine.com/badastronomy/2010/06/01/is-betelgeuse-about-to-blow/
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Astronomers detect 'monster star'

http://www.bbc.co.uk/news/science-environment-10707416

http://en.wikipedia.org/wiki/List_of_largest_known_stars

http://www.youtube.com/watch?v=HEheh1BH34Q

http://www.coasttocoastam.com/article/monster-star

http://www.universetoday.com/2008/04/06/what-is-the-biggest-star-in-the-universe/

http://www.abc.net.au/science/articles/2008/02/22/2170157.htm

http://rst.gsfc.nasa.gov/Sect20/A5.html

http://www.universetoday.com/2005/01/11/three-largest-stars-discovered/

http://www.giantstars.de/

http://www.atlasoftheuniverse.com/12lys.html

http://web.hallym.ac.kr/~physics/course/a2u/cluster/lgstr.htm

http://www.theurbansky.com/