Andrew Planck

Astronomer, Teacher, Musician

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Copernicus

Pytheas Secondary Moon Craters

Pytheas Secondary Moon Craters

The week of January 20-26 takes us from Lunar Day 21 to Day 27. This week we will highlight the Pytheas secondary moon craters, visible on Tuesday night and Wednesday night close to the terminator. Pytheas secondary craters: [NW/G7-8; L=19°W]

Andrew Planck January 20, 2025January 16, 2025 Craters on the Moon, Lunar Days in January, Moon craters No Comments Read more

Pythagoras: Complex Moon Crater with Two Central Mountain Peaks

Pythagoras: Complex Moon Crater with Two Central Mountain Peaks

The week of July 1-7 takes us from Lunar Day 25 to Day 2. This week we will highlight the moon crater Pythagoras, located to the West of Mare Frigoris in the NW quadrant of the Field Map at C3.

Andrew Planck July 1, 2024July 1, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters 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

Moon Crater Pytheas with its Secondary Craters

Moon Crater Pytheas with its Secondary Craters

The week of December 4-10 takes us from Day 22 to Day 27. This week we will highlight the moon crater Pytheas with its secondary craters, viewable on Tuesday after midnight. Pytheas secondary moon craters: [NW/G7-8; L=19°W] The best place

Andrew Planck December 4, 2023November 30, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in December, Splash Rays on the Moon, Uncategorized No Comments Read more

Eudoxus: Complex Moon Crater

Eudoxus: Complex Moon Crater

The week of July 31 – August 6 takes us from Day 14 to Day 21. This week we will highlight the moon crater Eudoxus, viewable early Sunday morning before sunrise. Eudoxus: [NE/E11; L=16°E] Both Eudoxus and Aristoteles to its

Andrew Planck July 31, 2023July 30, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August, Lunar Days in July No Comments Read more

Moon Crater Janssen versus Copernicus, Queen of Moon Craters

Moon Crater Janssen versus Copernicus, Queen of Moon Craters

The week of September 26 – October 2 takes us from Lunar Day 1 to Day 8. This week we will highlight the crater Janssen, viewable Thursday evening very close to the terminator, and Friday evening. Janssen: [SE/P13; L=40°E] Janssen

Andrew Planck September 26, 2022September 25, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September, Rilles on the Moon No Comments Read more

Pythagoras: Complex Moon Crater with Two Central Mountain Peaks

Pythagoras: Complex Moon Crater with Two Central Mountain Peaks

This week we will highlight the moon crater Pythagoras, viewable on Tuesday evening. Pythagoras1 : [NW/C3; L=63°W] There is only a brief period during each lunation when Pythagoras is visible. It is a complex crater with two central mountain peaks,

Andrew Planck July 11, 2022July 11, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Unusual Features on the Moon No Comments Read more

Moon Crater Kepler: Rays Intertwine with Copernicus and Aristarchus

Moon Crater Kepler: Rays Intertwine with Copernicus and Aristarchus

The week of April 25 – May 1st takes us from Day 25 to Day 1. This week we will highlight the moon crater Kepler, viewable before sunrise on Tuesday. Kepler1: [NW/J6; L=38°W] Kepler is a substantial 20-mile crater with

Andrew Planck April 25, 2022April 24, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April, Unusual Features on the Moon 1 Comment Read more

Moon Crater Copernicus Has Been Justifiably Dubbed “The Monarch of the Moon”

Moon Crater Copernicus Has Been Justifiably Dubbed “The Monarch of the Moon”

The week of March 22-28 takes us from Lunar Day 9 to Day 15. This week we will highlight the moon crater Copernicus, located in the NW quadrant just below Mare Imbrium. Copernicus:1 [NW/J7; L=20°W] Magnificent Copernicus has been justifiably

Andrew Planck March 22, 2021March 22, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in March No Comments Read more

Moon Crater Copernicus – The Monarch of the Moon

Moon Crater Copernicus – The Monarch of the Moon

The week of July 13-19 takes us from Lunar Day 22 to Day 28. This week we will highlight the crater Copernicus, viewable around 3:00 a.m. on Tuesday and Wednesday, and the comet Neowise. Copernicus1: [NW/J7] Magnificent Copernicus has been

Andrew Planck July 13, 2020July 13, 2020 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July No Comments Read more
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