Andrew Planck

Astronomer, Teacher, Musician

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Moon Crater Longomontanus: Exception to the Rule About Moon Crater Age

Moon Crater Longomontanus: Exception to the Rule About Moon Crater Age

The week of May 23-29 takes us from Day 24 to Day 29. This week we will highlight the moon crater Longomontanus, viewable on Tuesday morning just before sunrise. [SW/P7; L=22°W] Take a look at Longomontanus and before reading further,

Andrew Planck May 23, 2022May 21, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in May, Unusual Features on the Moon No Comments Read more

Brightest Spot on the Moon: Moon Crater Aristarchus

Brightest Spot on the Moon: Moon Crater Aristarchus

The week of May 16-22 takes us from Day 16 to Day 23. This week we will highlight the moon crater Aristarchus. Aristarchus: [NW/G5; L=47°W] The moon crater Aristarchus is the brightest spot on the Moon. It is so bright

Andrew Planck May 16, 2022May 15, 2022 Dates to Observe Objects on the Moon, Lunar Days in May, Unusual Features on the Moon No Comments Read more

Blood Moon – Lunar Eclipse

Blood Moon – Lunar Eclipse

The week of May 9-15 takes us from Day 8 to Day 15. This week we will highlight a lunar eclipse to take place on Sunday, May 15. A total lunar eclipse will occur on Sunday, May 15. It is

Andrew Planck May 9, 2022May 8, 2022 Dates to Observe Objects on the Moon, Lunar Days in May, Lunar Eclipse No Comments Read more

Southern Highlands and Moon Crater Stöfler

Southern Highlands and Moon Crater Stöfler

The week of May 2-8 takes us from Day 2 to Day 7. This week we will highlight the Southern Highlands and the crater Stōfler, viewable Sunday evening. Southern Highlands: [SE ±K-R11] There is a veritable blizzard of craters in

Andrew Planck May 2, 2022April 30, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in May 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 No Comments Read more

The Most Imposing Trio of Craters on the Moon: Theophilus, Cyrillus, and Catharina

The Most Imposing Trio of Craters on the Moon: Theophilus, Cyrillus, and Catharina

The week of April 18-24 takes us from Day 17 to Day 24. This week we will highlight the craters Theophilus, Cyrillus, and Catharina, viewable on Tuesday night. Theophilus, Cyrillus, Catharina: [SE/L12] This is the most imposing trio of craters

Andrew Planck April 18, 2022April 18, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April No Comments Read more

Mare Humorum: One of the Best Examples of Subsidence on the Moon

Mare Humorum: One of the Best Examples of Subsidence on the Moon

The week of April 11-17 takes us from Day 10 to Day 16. This week we will highlight Mare Humorum on the moon, viewable on Tuesday evening. Mare Humorum: [SW/M6] The Humorum basin is one of the best examples of

Andrew Planck April 11, 2022April 11, 2022 Dates to Observe Objects on the Moon, Lunar Days in April, Subsidence on the Moon No Comments Read more

Triesnecker Rilles on the Moon: A Complex System Resembling a Railway Switchyard

Triesnecker Rilles on the Moon: A Complex System Resembling a Railway Switchyard

The week of April 4-10 takes us from Day 4 to Day 9. This week we will highlight the Triesnecker rilles on the moon and an object informally known as the “Lunar X.” Triesnecker Rilles: [NE/J10] What a great place

Andrew Planck April 4, 2022April 3, 2022 Dates to Observe Objects on the Moon, Lunar Days in April, Rilles on the Moon, Unusual Features on the Moon No Comments Read more

Moon Crater Humboldt: Cluster of Central Peaks and Crater Chain

Moon Crater Humboldt: Cluster of Central Peaks and Crater Chain

The week of March 28 – April 3rd takes us from Day 26 to Day 3. This week we will highlight the moon crater Humboldt. Humboldt1: [SE/M18] This moon crater is best viewed when there is a pronounced libration; tonight

Andrew Planck March 28, 2022March 27, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in March No Comments Read more

Eudoxus and Aristoteles: Complex Moon Craters with Terraced Walls

Eudoxus and Aristoteles: Complex Moon Craters with Terraced Walls

The week of March 21-27 takes us from Day 19 to Day 25. This week we will highlight the moon craters Aristoteles and Eudoxus, viewable early Wednesday morning. Aristoteles1: [NE/D11; L=17°E] Close to the terminator this morning there is an

Andrew Planck March 21, 2022March 19, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in March No Comments Read more
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