Sources for Biography

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

http://www.nndb.com/people/649/000096361/

http://www.johannes-hevelius.com/

http://www.gap-system.org/~history/Biographies/Hevelius_Johannes.html

Book:
Science and Its Times. Ed. Neil Schlager and Josh Lauer. Vol. 3: 1450 to 1699. Detroit: Gale, 2001. p373.

Science and Its Times. Ed. Neil Schlager and Josh Lauer. Vol. 3: 1450 to 1699. Detroit: Gale, 2001. p339-342.