The week of January 4-10 takes us from Lunar Day 21 to 27. This week we will highlight Hadley Rille, viewable at midnight on Monday. Rima Hadley: [NE/G10] This feature formed as lava from a nearby volcanic vent flowed onto
The week of October 5-11 takes us from Lunar Day 18 to Day 24. This week we will highlight the crater Plinius, viewable on Monday and Tuesday evenings. Plinius: [NE/H12] Standing sentinel between Tranquillity and Serenity is the crater Plinius,
The week of August 17-23 takes us from Lunar Day 28 to Day 5. This week we will highlight the crater Janssen, observable on Sunday evening. Janssen: [SE/P13] Janssen is located 85 miles southwest of the Rheita Valley (which you
The week of July 20-26 takes us from New Moon to Lunar Day 7. This week we will highlight the craters Bürg and Lacus Mortis. Lacus Mortis: [NE/E12; L=27°E] The charmingly named “Lake of Death” is a large lava-flooded crater.
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