Andrew Planck

Astronomer, Teacher, Musician

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lunar dates

Enigma of the Moon – Triesnecker Rilles

Enigma of the Moon – Triesnecker Rilles

The week of September 18-24 takes us from Day 27 to Day 10. This week we will highlight the Triesnecker Rilles, an enigma located on the moon in the NE quadrant of the Field Map at J10 and viewable on

Andrew Planck September 18, 2023September 15, 2023 Dates to Observe Objects on the Moon, Lunar Days in September, Rilles on the Moon No Comments Read more

Rima Hyginus: A Line of Linked Moon Craters

Rima Hyginus: A Line of Linked Moon Craters

The week of September 4 – September 10 takes us from Day 20 to Day 26. This week we will highlight Rima Hyginus, viewable on Tuesday before midnight. Rima Hyginus: [NE/J10; L=8°E] At the west end of the Ariadaeus rille,

Andrew Planck September 4, 2023August 31, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September, Rilles on the Moon No Comments Read more

Multi-Ring Basin on the Moon – Mare Nectaris

Multi-Ring Basin on the Moon – Mare Nectaris

The week of August 28 – September 3 takes us from Day 13 to Day 20. This week we will highlight Mare Nectaris on the moon, which is viewable Sunday night in the SE quadrant of Lunar Map at L13.

Andrew Planck August 28, 2023August 25, 2023 Dates to Observe Objects on the Moon, Lunar Days in August, Multi-ring basin on the moon No Comments Read more

Moon Craters in Fra Mauro Region Critical to Understanding Important Process That Shaped the Moon

Moon Craters in Fra Mauro Region Critical to Understanding Important Process That Shaped the Moon

The week of July 10 – July 16 takes us from Day 22 to Day 29. This week we will highlight moon craters in the Fra Mauro region, viewable before sunrise on Tuesday. Fra Mauro region: [SW/K8; L=17°W] Moon craters

Andrew Planck July 10, 2023July 6, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters No Comments Read more

Archimedes: Prominent 50-mile Moon Crater with Terraces

Archimedes: Prominent 50-mile Moon Crater with Terraces

The week of July 3 – July 9 takes us from Day 15 to Day 22. This week we will highlight the moon crater Archimedes, viewable after midnight on Sunday. Archimedes1: [NW/G9; L=4°W] This is a prominent 50-mile moon crater

Andrew Planck July 3, 2023July 3, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July No Comments Read more

Mare Imbrium – One Time Multi-Ring Basin on the Moon

Mare Imbrium – One Time Multi-Ring Basin on the Moon

The week of June 26-July 2nd takes us from Day 8 to Day 14. This week we will highlight Mare Imbrium on the moon, which should be 80% visible on Tuesday evening. The Moon has now entered its gibbous phase

Andrew Planck June 26, 2023June 28, 2023 Lunar Days in June, Multi-ring basin on the moon No Comments Read more

Rima Ariadaeus – Example of a Graben on the Moon

Rima Ariadaeus – Example of a Graben on the Moon

The week of June 19-25 takes us from Day 2 to Day 7. This week we will highlight Rima Ariadaeus, located in the NE quadrant of the Field Map at J11. Rima Ariadaeus: [NE/J11; L=14°E] The best place to see

Andrew Planck June 19, 2023June 19, 2023 Dates to Observe Objects on the Moon, Lunar Days in June, Rilles on the Moon No Comments Read more

Rille Rima Marius on the Moon

Rille Rima Marius on the Moon

The week of June 12-18 takes us from Day 25 to Day 1. This week we will highlight the rille Rima Marius on the moon (in the NW quadrant of the Moon Map at H5) and viewable early Tuesday morning.

Andrew Planck June 12, 2023June 8, 2023 Dates to Observe Objects on the Moon, Lunar Days in June, Rilles on the Moon No Comments Read more

Moon Crater Hippalus: Finest Examples of Arcuate Rilles

Moon Crater Hippalus: Finest Examples of Arcuate Rilles

The week of May 29 – June 4 takes us from Day 10 to Day 16. This week we will highlight the Hippalus rilles, viewable on Tuesday evening. Rimae Hippalus: [SW/M6; L=29°W] On the east shore of Mare Humorum you

Andrew Planck May 29, 2023May 20, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in May, Rilles on the Moon No Comments Read more

Sulpicius Gallus Rilles on the Moon

Sulpicius Gallus Rilles on the Moon

The week of May 22-28 takes us from Day 3 to Day 9. This week we will highlight the Sulpicius Gallus rilles on the moon, viewable on Friday evening. Sulpicius Gallus Rilles: [NE/G10-11; L=10°E] These rilles, located on the south-western

Andrew Planck May 22, 2023May 17, 2023 Lunar Days in May, Mars, Rilles on the Moon, Venus No Comments Read more
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