The week of December 23-29 takes us from Lunar Day 23 to Day 29. This week we will highlight a feature called Rimae Sirsalis, visible on Thursday night. Rimae Sirsalis: [SW/L3-4; L=62°W] Just in from the southwest shore of Oceanus
Series of Rilles on the Moon: Rimae Sirsalis
The week of July 29 – August 4 takes us from Day 24 to New Moon. This week we will highlight a series of rilles called Rimae Sirsalis, located in the SW quadrant of the Field Map and viewable on