The week of June 15-21 takes us from Lunar Day 24 to New Moon. This week we will highlight the crater Gassendi, viewable early Tuesday morning. Gassendi: [SW/L5; L=40°W] Three generations of crater age can be easily observed on Mare
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
The week of May 11-17 takes us from Lunar Day 20 to Day 25. This week we will highlight Rima Hyginus, viewable Wednesday morning, and Mare Vaporum, viewable Wednesday & Thursday mornings. Mare Vaporum: [NE/H10; L=4°E] Notice how there are
The week of May 4-10 takes us from Lunar Day 12 to Day 19. This week we will highlight the Sirsalis Rilles and the crater Galilaie, viewable on Tuesday evening. Rimae Sirsalis: [SW/L3-4] Just in from the southwest shore of
The week of April 27 – May 3 takes us from Lunar Day 5 to Day 11. This week we will highlight the crater Manilius and the Sulpicius Gallus Rilles, viewable on Wednesday evening, Day 7. Sulpicius Gallus Rilles: [NE/G10-11]
The week of March 16-22 takes us from Lunar Day 23 to Day 28. This week we will highlight the Hippalus rilles, viewable around 5:00 a.m. on Wednesday morning. Rimae Hippalus: [SW/M6] On the east shore of Mare Humorum you
The week of January 27-February 2 takes us from Day 3 to Day 8. This week we will highlight the craters Posidonius and le Monnier, viewable on Thursday evening. Posidonius/le Monnier: [NE/F-G13] There are only two craters of any consequence
The week of January 20-26 takes us from Day 25 to Day 2. Unfortunately the Moon is too close to the Sun all week long to observe it, although you might be able to squeeze in something early Tuesday morning.
The week of December 30 – January 5 takes us from Day 4 to Day 10. This week we will highlight Rima Hyginus (the Hyginus Rille), viewable on Thursday evening, and the Quadrantid meteor shower. Rima Hyginus: [NE/J10;] At the
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