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Andrew Planck

Astronomer, Teacher, Musician

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Lunar Days in January

Mare Orientale: Moon’s Greatest and Most Pristine Example of a Multi-Ring Impact Basin

Cordillera Mountains - outer ring for Mare Orientale on the moon

The week of January 22-28 takes us from Day 12 to Day 18. This week we will highlight Mare Orientale on the moon, viewable on Tuesday. Mare Orientale/Cordillera Mountains: [SW/L-M libration zone; L=82°W] It is a pity that we are

Andrew Planck January 22, 2024January 19, 2024 Lunar Days in January, Multi-ring basin on the moon No Comments Read more

Three Imposing Moon Craters: Theophilus, Cyrillus, and Catharina

Theophilus on the moon

The week of January 15-21 takes us from Day 5 to Day 11. This week we will highlight the moon craters Theophilus, Cyrillus, and Catharina, viewable on Tuesday night. Day 6 (T=10° E.) Theophilus, Cyrillus, Catharina: [Repeated from Day 5–SE/L12;

Andrew Planck January 15, 2024January 10, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January, Moon craters No Comments Read more

Taruntius: Floor-Fractured Moon Crater

Taruntius is a floor-fractured moon crater

The week of January 8-14 takes us from Day 27 to Day 4. This week we will highlight the moon crater Taruntius viewable on Sunday night and found in the NE quadrant of the Field Map at J4. Taruntius: [NE/J14;

Andrew Planck January 8, 2024January 5, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Floor Fractured Moon Craters, Lunar Days in January No Comments Read more

Catena Davy – Fascinating Moon Crater Chain

Catena Davy moon crater chain

The week of January 1-7 takes us from Day 21 to Day 26. This week we will highlight the Catena Davy viewable on Tuesday night and found in the SW quadrant of the Field Map. Catena Davy: [SW/L9; L=7°W] This

Andrew Planck January 1, 2024December 17, 2023 chain of moon craters, Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January, Moon craters No Comments Read more

Mare Frigoris on the Moon and the Gargantuan Hypothesis

Gargantuan Basin on the moon

The week of January 30 to February 5 takes us from Lunar Day 10 to Day 15. This week we will highlight Mare Frigoris, located in the NE quadrant of the Field Map and viewable on Tuesday evening. Mare Frigoris:

Andrew Planck January 30, 2023January 25, 2023 Gargantuan hypothesis, Lunar Days in January No Comments Read more

Floor Fractured Moon Craters – Sabine and Ritter

sabine and ritter craters on the moon

The week of January 23 to January 29 takes us from Lunar Day 3 to Day 9. This week we will highlight the moon craters Sabine & Ritter, viewable on Friday evening and located in the NE quadrant of the

Andrew Planck January 23, 2023January 21, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January No Comments Read more

Moon Crater Gassendi: One of Moon’s Most Beautiful and Interesting Objects

Gassendi crater on the moon

The week of January 16 to January 22 takes us from Lunar Day 24 to Day 0.6. This week we will highlight the moon crater Gassendi. Gassendi: [SW/L5; L=40°W] Three generations of crater age can be easily observed on Mare

Andrew Planck January 16, 2023January 13, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Floor Fractured Moon Craters, Lunar Days in January, Rilles on the Moon No Comments Read more

Moon Crater Proclus: One of the Brightest Spots on the Moon

Proclus crater on the moon

The week of January 9 to January 15 takes us from Lunar Day 17 to Day 22. This week we will highlight the moon crater Proclus, near Mare Crisium. Proclus: [NE/H14; L=47°E] Proclus is a small moon crater located just

Andrew Planck January 9, 2023January 4, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January No Comments Read more

Moon Crater Marius: Largest Dome Field on the Moon

moon crater Marius is the largest dome field on the Moon

The week of January 2 to January 8 takes us from Lunar Day 11 to Day 17. This week we will highlight the Marius dome field located in the NW quadrant of the Field Map and viewable Tuesday evening. Marius

Andrew Planck January 2, 2023January 3, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Domes on the Moon, Lunar Days in January, Uncategorized No Comments Read more

Messier and Messier A: Small Pair of Moon Craters on the Sea of Fertility

Messier small pair of moon craters

The week of January 31 – February 6 takes us from Day 29 to Day 6. This week we will highlight the moon craters Messier and Messier A, viewable on Friday night. Messier1: [SE/K14] One of my favorite objects on

Andrew Planck January 31, 2022January 30, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February, Lunar Days in January No Comments Read more
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It is highly recommended that you get a copy of Sky and Telescope's Field Map of the Moon, the very finest Moon map available for use at the telescope. It is available for $10.95 at www.skyandtelescope.com and on Amazon. All features mentioned in this blog will be keyed to the grid on the Field Map and will look like this: Plato: [NW/D9]

Credits: Courtesy of Gray Photography of Corpus Christi, Texas Lunar photos: NASA / USGS / BMDO / LROC / ASU / DLR / LOLA / Moon Globe. Used by permission

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Andrew Planck
Andrew Planck
Author and Astronomer Andrew Planck shepherds you to the moon and its mysteries of intrigue and surprise. Learn about the moon’s most fascinating objects, understand how the moon was formed and the names of many of the craters … and why they honor individuals who have changed the course of history.
Andrew Planck
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