Q3 Astronomer Sources: James H. Jeans

http://www.britannica.com/EBchecked/topic/302187/Sir-James-Jeans

http://www-history.mcs.st-and.ac.uk/Biographies/Jeans.html

http://www.infoplease.com/encyclopedia/people/jeans-sir-james-hopwood.html

http://biography.yourdictionary.com/sir-james-hopwood-jeans