Andrew Planck

Astronomer, Teacher, Musician

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lunar dates

Eratosthenes – Complex Moon Crater

Eratosthenes – Complex Moon Crater

The week of August 16-22 takes us from Lunar Day 9 to Day 15. This week we will highlight the moon crater Eratosthanes, viewable Monday night. Eratosthenes: [NW/H8; L=11°W] A large (36-mi.) complex moon crater with terraced walls, central peaks,

Andrew Planck August 16, 2021August 15, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August No Comments Read more

Moon Crater Fracastorius: One of the Best Examples of Subsidence

Moon Crater Fracastorius: One of the Best Examples of Subsidence

The week of August 9-15 takes us from Lunar Day 2 to Day 8. This week we will highlight the crater Fracastorius, viewable Thursday evening. Fracastorius: [SE/M13] Located on the south shore of Mare Nectaris, this is one of the

Andrew Planck August 9, 2021August 7, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August, Uncategorized No Comments Read more

Moon Crater Aristarchus: Brightest Spot on the Moon

Moon Crater Aristarchus: Brightest Spot on the Moon

The week of August 2-8 takes us from Lunar Day 25 to Day 1. This week we will highlight the Aristarchus Plateau and moon crater Aristarchus. Aristarchus Plateau: [NW/G4-5] This plateau is a diamond-shaped feature with straight sides measuring 100

Andrew Planck August 2, 2021July 31, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August, Lunar Observers, Unusual Features on the Moon No Comments Read more

The Two Largest Intact Moon Craters: Peirce and Picard

The Two Largest Intact Moon Craters: Peirce and Picard

The week of July 26 – August 1 takes us from Lunar Day 18 to Day 23. This week we will highlight the moon craters Peirce and Picard, viewable early Tuesday morning. Peirce & Picard: [NE/H15] The two largest intact

Andrew Planck July 26, 2021July 31, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July No Comments Read more

Moon Crater Schiller is a Curiosity

Moon Crater Schiller is a Curiosity

The week of July 19-25 takes us from Lunar Day 10 to Day 17. This week we will highlight the crater Schiller, viewable Tuesday and Wednesday night in the SW quadrant. Schiller: [SW/Q6] Schiller is a curiosity. It has the

Andrew Planck July 19, 2021July 19, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Unusual Features on the Moon No Comments Read more

Imbrium Basin and Caucasus Mountains on the Moon

Imbrium Basin and Caucasus Mountains on the Moon

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

Andrew Planck July 12, 2021July 11, 2021 Lunar Days in July, Mountain Ranges on the Moon No Comments Read more

Moon Crater Gassendi: Three Generations of Crater Age

Moon Crater Gassendi: Three Generations of Crater Age

The week of July 5-11 takes us from Lunar Day 25 to Day 2. This week we will highlight the crater Gassendi, viewable early Monday morning. Gassendi: [SW/L5; L=40°W] Three generations of crater age can be easily observed on Mare

Andrew Planck July 5, 2021July 5, 2021 Craters on the Moon, Lunar Days in July, Unusual Features on the Moon No Comments Read more

Features of Moon Crater Seleucus and Bailly

Features of Moon Crater Seleucus and Bailly

The week of June 21-27 takes us from Lunar Day 12 to Day 19. This week we will highlight the craters Seleucus and Bailly, viewable on Wednesday night. Seleucus1: [NW/G3] Seleucus is an admirable little 27-mile crater sitting by itself

Andrew Planck June 21, 2021June 21, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June No Comments Read more

Sabine & Ritter: Moon Craters West of the Apollo 11 Landing Site

Sabine & Ritter: Moon Craters West of the Apollo 11 Landing Site

The week of June 14-20 takes us from Lunar Day 4 to Day 11. This week we will highlight the craters Sabine & Ritter, located near the S.W. shore of Tranquillity. Sabine & Ritter: [NE/J11] About 60 miles west of

Andrew Planck June 14, 2021June 14, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June No Comments Read more

Lunar Basin Grimaldi and Lunar Transient Phenomena

Lunar Basin Grimaldi and Lunar Transient Phenomena

The week of June 7 – 13 takes us from Lunar Day 27 to Day 3. This week we will highlight the lunar basin Grimaldi, located near the western limb of the Moon. Grimaldi has a very dark floor and

Andrew Planck June 7, 2021June 6, 2021 Dates to Observe Objects on the Moon, Lunar Basin, Lunar Days in June No Comments Read more
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