Artists drawing of astronomer Joannes Kelper. Wikipedia (Public Domain)

Wikimedia (Public Domain) 120823
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1928, and if not then due to lack of notice or renewal.
https://commons.wikimedia.org/wiki/File:JKepler.jpg