The week of April 18-24 takes us from Day 17 to Day 24. This week we will highlight the craters Theophilus, Cyrillus, and Catharina, viewable on Tuesday night. Theophilus, Cyrillus, Catharina: [SE/L12] This is the most imposing trio of craters
The week of July 12-18 takes us from Lunar Day 3 to Day 9. This week we will highlight the Imbrium Basin, half of which is viewable on Saturday evening, and the Caucasus Mountains, best viewed on Friday evening. Mare
The week of May 31 – June 6 takes us from Lunar Day 21 to Day 27. This week we will highlight the Ariadaeus and Hyginus rills. Ariadaeus: [NE/J11; L=17°E] The Ariadaeus Rille (Rima Ariadaeus) is named after this 7-mi.
The week of March 1-7 takes us from Lunar Day 18 to Day 24. This week we will highlight Rupes Cauchy, located on the eastern portion of the Sea of Tranquility. Rupes Cauchy [NE/J13]: One of the best-known faults on
The week of December 14-20 takes us from New Moon to Day 6.5. This week we will highlight the crater Arago and its surrounding domes, viewable on Sunday night. Arago: [NE/J12] About 50 miles from the western shore of Tranquillity
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