Johann Hommel

Johann Hommel (also Johannes Homelius, Hummelius, Homilius, Hummel; 2 February 1518, Memmingen – 4 July 1562, Leipzig) was a German astronomer and mathematician.

Work

Hommel was appointed professor of mathematics at the University of Leipzig in 1551.

In 1552 or 1553, Richard Cantzlar introduced transversal dot lines in graduations. It was a variant of the zigzag line system introduced by Hommel. Tycho Brahe obtained the zigzag line system from Hommel.

The lunar crater Hommel is named after him.

Sources
  • Johann Daniel Schulze, Abriß einer Geschichte der Leipziger Universität, Hinrichs, 1810, p. 48.
  • Kevin Krisciunas (1999), "Observatories"
gollark: Great, another 2G prize offer. Really helping with my decision here...
gollark: _has denied it_
gollark: _considers offering on it_
gollark: If I leave it a while, are people likely to be annoyed and withdraw offers or are people used to keeping them on for a while on rare stuff?
gollark: I guess it's hardly a *bad* problem as such.
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