Andrew Planck

Astronomer, Teacher, Musician

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Lunar Eclipse

Moon Craters Cleomedes and Proclus

Moon Craters Cleomedes and Proclus

The week of March 10-16 takes us from Lunar Day 11 to Day 17. This week we will highlight the moon craters Cleomedes and Proclus visible on Sunday night close to the terminator. Cleomedes: [NE/G15] Cleomedes is the first significant

Andrew Planck March 10, 2025March 6, 2025 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in March, Moon craters No Comments Read more

Vallis Rheita: Series of Interlocking Moon Craters

Vallis Rheita: Series of Interlocking Moon Craters

The week of February 6-12 takes us from Lunar Day 16 to Day 21. This week we will highlight Vallis Rheita, located in the SE quadrant of the Field Map and viewable on Tuesday night. Vallis Rheita: [SE/N14; L=52°E] At

Andrew Planck February 6, 2023February 6, 2023 chain of moon craters, Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in February No Comments Read more

Wrinkle Ridge Dorsum Oppel on the Moon and the Lunar Eclipse

Wrinkle Ridge Dorsum Oppel on the Moon and the Lunar Eclipse

The week of November 7-13 takes us from Lunar Day 15 to Day 20. This week we will highlight the wrinkle ridge Dorsum Oppel on the moon and the lunar eclipse. Dorsum Oppel: [NE/H15; L=53°E] As the lava cooled following

Andrew Planck November 7, 2022November 9, 2022 Lunar Days in November, Lunar Eclipse, Lunar Observers, Unusual Features on the Moon, Wrinkle Ridge 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

Furnerius A: Tiny Moon Crater That Can Splash its Debris Over Nearly Half of the Moon’s Surface

Furnerius A: Tiny Moon Crater That Can Splash its Debris Over Nearly Half of the Moon’s Surface

The week of May 24-30 takes us from Lunar Day 13 to Day 20. This week we will highlight the crater Furnerius A, viewable late Thursday evening. Furnerius A: [SE/N15] On Day 3 we introduced you to Furnerius A and

Andrew Planck May 24, 2021May 23, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in May No Comments Read more

5 Spectacular Sites in Space: Rilles, Cobra Head Volcano, Longest Lunar Eclipse of the Century & 12 New Moons Orbiting Jupiter

5 Spectacular Sites in Space: Rilles, Cobra Head Volcano, Longest Lunar Eclipse of the Century & 12 New Moons Orbiting Jupiter

The week of July 23-29 takes us from Day 11 to Day 16. Full Moon is on Friday. This week we will highlight Rima Marius, visible on Tuesday night at 11:00 PM EDT, also Schröter’s Valley and the Cobra Head

Andrew Planck July 23, 2018July 22, 2018 Jupiter, Lunar Days in July, Rilles on the Moon No Comments Read more

Last Total Eclipse During a “Super Blue Blood Moon” – 150 years Ago

Last Total Eclipse During a “Super Blue Blood Moon” – 150 years Ago

The week of January 29 – February 4 takes us from Day 13 through Day 19. This week we will highlight the total lunar eclipse of January 31st. On Wednesday morning there will be a quadruple whammy: a total lunar

Andrew Planck January 29, 2018January 29, 2018 Constellations, Lunar Days in January, Lunar Days in July 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
Latest posts by Andrew Planck (see all)
  • Moon Crater Cassini – Created on Imbrium floor Before Lavas Started to Flow - January 19, 2026
  • Bailly – Largest Crater on Our Side of the Moon - January 12, 2026
  • Longomontanus: Exception to the Rule About Moon Crater Age - January 5, 2026
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