The week of June 29-July 5 takes us from Lunar Day 9 to Day 16. This week we will highlight Mare Imbrium, viewable throughout the week. Mare Imbrium: [±NW/F8] The Imbrium basin was created 3.9 billion years ago when an
The week of June 1-7 takes us from Lunar Day 10 to Day 17. This week we will highlight two rilles: Rima Hesiodus and Rimae Ramsden. Rima Hesiodus: [SW/N7-M8; L=20°W] The linear rille Rima Hesiodus is a graben (a special
I hope everybody caught the transit of Mercury across the face of the Sun on Monday morning! The week of November 11-17 takes us from Day 14 (virtually the Full Moon) to Day 20. This week we will highlight the
The week of July 22-28 takes us from Day 20 to Day 26. This week we will highlight Rima Hyginus viewable early Tuesday morning. Rima Hyginus: [NE/J10] At the west end of the Ariadaeus rille, there is a narrow diagonal
The week of February 19-25 takes us from Day 4 to Day 10. This week we will highlight the craters Ariadaeus (viewable on Day 6, Wed. night) and Walther (viewable Thursday). Ariadaeus: [NE/J11] The Ariadaeus Rille (Rima Ariadaeus) is named
The week of November 27 – December 3rd takes us from the end of Day 8 to Day 15. This week we will highlight the crater Pitatus, visible on Monday night. Pitatus: [SW/M8; L=14°W] For several reasons, Pitatus is one