Andrew Planck

Astronomer, Teacher, Musician

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Lunar Days in February

Moon Craters Langrenus & Vendelinus

Moon Craters Langrenus & Vendelinus

The week of February 24 – March 2 takes us from Lunar Day 26 to Day 3. This week we will highlight the moon craters Langrenus & Vendelinus, visible on Sunday night. The Great Eastern Chain: [SE/K-N16; L=61°E] There is

Andrew Planck February 24, 2025February 21, 2025 chain of moon craters, Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February, Lunar Days in March, Moon craters No Comments Read more

3 Moon Craters Visible Near the Terminator

3 Moon Craters Visible Near the Terminator

The week of February 17-23 takes us from Lunar Day 20 to Day 26. This week we will highlight the moon craters Ptolemaeus, Alphonsus, and Arzachel, visible on Wednesday night near the terminator. Ptolemaeus, Alphonsus, Arzachel: [SW/K-L9; L=3°W] (These may

Andrew Planck February 17, 2025February 14, 2025 chain of moon craters, Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February, Moon craters No Comments Read more

Cauchy Domes on the Moon

Cauchy Domes on the Moon

The week of February 10-16 takes us from Lunar Day 13 to Day 18. This week we will highlight the Cauchy Domes on the moon, visible on Sunday night near the terminator. Cauchy domes: [NE/J13; L=36°E] During sunrise over this

Andrew Planck February 10, 2025February 7, 2025 Dates to Observe Objects on the Moon, Domes on the Moon, Lunar Days in February No Comments Read more

Apennine Mountain Range – Result of Impact that Created Imbrium Basin on the Moon

Apennine Mountain Range – Result of Impact that Created Imbrium Basin on the Moon

The week of February 3-9 takes us from Lunar Day 5 to Day 12. This week we will highlight the Apennine Mountains on the moon, visible on Thursday night close to the terminator. Montes Apenninus: The Apennine Mountain Range is

Andrew Planck February 3, 2025January 30, 2025 Dates to Observe Objects on the Moon, Lunar Days in February, Mountain Ranges on the Moon No Comments Read more

Rupes Cauchy and Rupes Recta – Best Known Faults on the Moon

Rupes Cauchy and Rupes Recta – Best Known Faults on the Moon

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

Andrew Planck January 27, 2025January 27, 2025 Dates to Observe Objects on the Moon, Faults on the Moon, Lunar Days in February, Lunar Days in January, Rilles on the Moon No Comments Read more

Langrenus & Vendelinus Moon Craters: First Two Segments of Great Eastern Chain

Langrenus & Vendelinus Moon Craters: First Two Segments of Great Eastern Chain

The week of February 19-25 takes us from Day 11 to 16. This week we will highlight the moon crater Langrenus, viewable on Sunday night. Langrenus & Vendelinus: [SE/K-L16; L=61°E] These craters are the first two segments of the Great

Andrew Planck February 19, 2024February 16, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February No Comments Read more

Most Spectacular Feature on the Moon – Apennine Mountain Range

Most Spectacular Feature on the Moon – Apennine Mountain Range

The week of February 12-18 takes us from Day 3 to Day 9. This week we will highlight Montes Apenninus, located in the NW quadrant of the field map and viewable on Friday evening. Montes Apenninus: The Apennine Mountain Range

Andrew Planck February 12, 2024February 9, 2024 Dates to Observe Objects on the Moon, Lunar Days in February, Mountain Ranges on the Moon No Comments Read more

The Bay of Rainbows on the Moon – Sinus Iridum

The Bay of Rainbows on the Moon – Sinus Iridum

The week of February 5-11 takes us from Day 25 to Day 2. This week we will highlight Sinus Iridum, viewable on Tuesday. Sinus Iridum: [NW/E6; L=32°W] Sinus Iridum (the Bay of Rainbows), located in the northwest sector of Mare

Andrew Planck February 5, 2024January 31, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February, Moon craters, Subsidence on the Moon, Wrinkle Ridge on the moon No Comments Read more

Moon Crater Fracastorius – Best Example of Subsidence

Moon Crater Fracastorius – Best Example of Subsidence

The week of January 29 – February 4 takes us from Day 18 to Day 24 This week we will highlight the moon crater Fracastorius, viewable on Tuesday. Fracastorius: [SE/M13; L=33°E] Located on the south shore of Mare Nectaris, this

Andrew Planck January 29, 2024January 26, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February, Lunar Days in January No Comments Read more

Bullialdus: The Most Conspicuous Moon Crater on Mare Nubium

Bullialdus: The Most Conspicuous Moon Crater on Mare Nubium

The week of February 27 – March 5 takes us from Lunar Day 8 to Day 14. This week we will highlight the moon crater Bullialdus, located in the SW quadrant of the Field Map and viewable on Wednesday night.

Andrew Planck February 27, 2023February 26, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February No Comments Read more
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