I like Mars.
A giant waterspout in the mature stage. During peak intensity this waterspout had a diameter of approximately 30 meters (via NOAA)
Oldest known photograph of a tornado. South Dakota, 22 miles southwest of Howard. August 28, 1884 (by NOAA Photo Library)
Astronaut Charles Conrad Jr., Apollo 12 commander, using a 70mm handheld Haselblad camera modified for lunar surface usage. (via NASA)
Wilhelm Wundt (standing, with gray beard) and colleagues.
Wilhelm Wundt (1832-1920) was a German physician, psychologist, physiologist and philosopher, known today as the “father of experimental psychology”. He wrote Grundzüge der physiologischen Psychologie (1874) [Principle of Physiological Psychology] and founded the first formal laboratory for psychological research at the University of Leipzig.
Saturn’s moon Mimas joins the planet’s rings which appear truncated by the planet’s shadow in this Cassini spacecraft image (via NASA)