Andrew Planck

Astronomer, Teacher, Musician

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Craters on the Moon

Aristillus and Autolycus: Well-Defined Complex Moon Craters

Aristillus and Autolycus: Well-Defined Complex Moon Craters

The week of June 20-26 takes us from Day 21 to Day 27. This week we will highlight the craters Aristillus and Autolycus, located in the N.E. quadrant of the Moon and viewable after midnight on Tuesday, June 21. Aristillus/Autolycus:

Andrew Planck June 20, 2022June 19, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June, Splash Rays on the Moon No Comments Read more

Crater Chain on the Moon – Catena Davy

Crater Chain on the Moon – Catena Davy

The week of June 6-12 takes us from Day 7 to Day 13. This week we will highlight the crater chain known as Catena Davy. Catena Davy: [SW/L9; L=7°W] This fascinating crater chain was made when a comet or asteroid

Andrew Planck June 6, 2022June 5, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June No Comments Read more

Moon Crater Mare Nectaris: Example of Multi-Ring Basin

Moon Crater Mare Nectaris: Example of Multi-Ring Basin

The week of May 30-June 5 takes us from New Moon to Day 6. This week we will highlight the moon crater Mare Nectaris, viewable on Saturday evening, Day 5. Mare Nectaris: [SE/L13] The Nectaris basin was excavated 3.9 billion

Andrew Planck May 30, 2022May 28, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June, Lunar Days in May, Multi-ring basin on the moon No Comments Read more

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

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

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

Vernal Equinox: Can an Egg Stand on Its End?

Vernal Equinox: Can an Egg Stand on Its End?

The week of March 14-20 takes us from Day 12 to Day 18. This week we will highlight the moon craters Endymion and Geminus which will be viewable on Saturday night around 11:00 P.M. Endymion: [NE/D15; L=57°E] This is an

Andrew Planck March 14, 2022March 14, 2022 Craters on the Moon, Dates to Observe Objects on the Moon No Comments Read more
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