Andrew Planck

Astronomer, Teacher, Musician

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Lunar Days in January

Floor Fractured Moon Craters – Sabine and Ritter

Floor Fractured Moon Craters – Sabine and Ritter

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

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

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

Moon Crater Proclus: One of the Brightest Spots 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: 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 and Messier A: Small Pair of Moon Craters on the Sea of Fertility

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

3 Interesting Facts About Moon Crater Plato

3 Interesting Facts About Moon Crater Plato

The week of January 24-30 takes us from Day 21 to Day 28. This week we will highlight the moon crater Plato, viewable on Monday and Tuesday nights. Plato: [NW/D9; L=9°W] When the terminator is a little to the east

Andrew Planck January 24, 2022January 23, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January, Unusual Features on the Moon No Comments Read more

Geminus and Burckhardt: Two Unique Moon Craters

Geminus and Burckhardt: Two Unique Moon Craters

The week of January 17-23 takes us from Full Moon to Day 21. This week we will highlight the moon craters Geminus and Burckhardt, viewable on Tuesday and Wednesday nights. Geminus: [NE/F15] Roughly 200 miles north of Mare Crisium 1

Andrew Planck January 17, 2022January 16, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January No Comments Read more

Most Spectacular Example of Subsidence on the Moon: Sinus Iridum

Most Spectacular Example of Subsidence on the Moon: Sinus Iridum

The week of January 10-16 takes us from Day 9 to Day 14. This week we will highlight Sinus Iridum, viewable on Wednesday and Thursday evenings. Sinus Iridum: [NW/E6; L=32°W] Sinus Iridum (the Bay of Rainbows), located in the northwest

Andrew Planck January 10, 2022January 9, 2022 Dates to Observe Objects on the Moon, Lunar Days in January, Subsidence on the Moon No Comments Read more

Peirce and Picard: Two Largest Intact Moon Craters on Mare Crisium

Peirce and Picard: Two Largest Intact Moon Craters on Mare Crisium

The week of January 3-9 takes us from Day 2 to Day 8. This week we will highlight the craters Peirce and Picard located in the NE quadrant of the Field Map and viewable on Wednesday evening. Peirce & Picard:

Andrew Planck January 3, 2022January 3, 2022 Dates to Observe Objects on the Moon, Intact Moon Craters, Lunar Days in January, Unusual Features on the Moon No Comments Read more

Moon Crater Schickard and Two Space Incidents in January

Moon Crater Schickard and Two Space Incidents in January

The week of January 25-31 takes us from Lunar Day 12 to 18. This week we will highlight the moon crater Schickard. Schickard: [SW/P4] When you look at Schickard, you should immediately notice something unusual – Schickard’s floor has stripes!

Andrew Planck January 25, 2021January 24, 2021 Craters on the Moon, 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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