November 28, 2020
Originally published May 11, 2011
image by Wes Higgins
Just below Tycho's eastern rim crest (at 2 o'clock and 4 o'clock positions) are smooth ponds of impact melt. Wes' remarkable image also shows that secondaries are concentrated on the east side of the crater, and a high Sun view demonstrates that there are fewer rays to the west. Tycho was formed by an oblique impact, with the projectile coming from the west. The forward momentum carried ejecta debris to the east, raking the surface with small impacts. It wouldn't have been a good place to be 109 my ago.
This is a repeat of a glorious LPOD from Aug 29, 2008.
08/23/08, 11:41:27 UT. 18" Reflector, Infinity 2-1m camera, MAP 150X64, stack of 498 frames .
Rükl plate 64
Yesterday's LPOD: The Moon On Earth
Tomorrow's LPOD: Cracker of a View