- German astronomer.
- a crater in the second quadrant of the face of the moon having an extensive ray system: about 22 miles (35 km) in diameter.
- Johannes (joˈhanəs). 1571–1630, German astronomer. As discoverer of Kepler's laws of planetary motion he is regarded as one of the founders of modern astronomy
- a small crater in the NW quadrant of the moon, centre of a large bright ray system
