The week of March 24-30 takes us from Lunar Day 25 to Day 2. This week we will highlight the Rima Sirsalis, visible on Tuesday night close to the terminator. Rimae Sirsalis: [SW/L3-4; L=62°W] Just in from the southwest shore
The week of January 27 – February 2 takes us from Lunar Day 28 to Day 5. This week we will highlight Rupes Cauchy, visible on Sunday night close to the terminator. Rupes Cauchy: [NE/J13; L=37°E] Two of the best-known
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
The week of July 22-28 takes us from Day 17 to Day 23. This week we will highlight Rupes Cauchy, viewable on Wednesday night and located in the NE quadrant of the Field Map at J13. Rupes Cauchy: [NE/J13; L=37°
The week of June 24-30 takes us from Lunar Day 19 to Day 25. This week we will highlight Rima Ariadaeus, located near the western edge of Mare Tranquillitatis in the NE quadrant of the Field Map at J11. It
The week of May 6-12 takes us from Day 28 to Day 5. This week we will highlight Rupes Cauchy, viewable on Sunday evening, May12, Day 5, and located in the NE quadrant of the Field Map at J13. Rupes
The week of April 15-21 takes us from Day 8 to Day 13. This week we will highlight Rimae Hippalus, the Hippalus Rilles, viewable on Thursday and Friday evening and located in the SW quadrant of the Field Map at
The week of October 9-15 takes us from Day 25 to Day 1. This week we will highlight a series of rilles called Rimae Sirsalis, located in the SW quadrant of the Field Map and viewable on Tuesday morning before
The week of September 18-24 takes us from Day 27 to Day 10. This week we will highlight the Triesnecker Rilles, an enigma located on the moon in the NE quadrant of the Field Map at J10 and viewable on
The week of August 21-27 takes us from Day 5 to Day 11. This week we will highlight Rima Ariadaeus on the moon, viewable Tuesday night. Rima Ariadaeus: NE/J11; L=14°E] The best place to see rilles on the Moon is