Andrew Planck

Astronomer, Teacher, Musician

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terminator on the moon

Crater de Gasparis – Hub of Rille Activity on the Moon

Crater de Gasparis – Hub of Rille Activity on the Moon

The week of November 29-December 5 takes us from Day 24 to Day 1. This week we will highlight the de Gasparis rilles and the Marius Hills, viewable between 4:00 AM and 5:00 on Tuesday morning. de Gasparis rilles: [SW/M4]

Andrew Planck November 29, 2021November 28, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in November, Rilles on the Moon No Comments Read more

Ground Zero on the Moon and the Sea of Vapors

Ground Zero on the Moon and the Sea of Vapors

The week of November 6-12 takes us from Day 18 to the end of Day 23. You can view the Moon before midnight through Thursday. This week we will highlight the crater Triesnecker and Mare Vaporum, the Sea of Vapors,

Andrew Planck November 6, 2017November 6, 2017 Craters on the Moon, Lunar Days in November, Lunar Observers, Uncategorized, Unusual Features on the Moon No Comments Read more

Lunar City – Colossal Buildings, Gigantic Ramparts and Moon Dwellers

Lunar City – Colossal Buildings, Gigantic Ramparts and Moon Dwellers

The week of July 31 – August 6 takes us from Day 8 to Day 14. This week we will highlight the so called “Lunar City,” viewable on Monday night, but the lighting has to be perfect, so if you’re

Andrew Planck July 31, 2017July 30, 2017 Craters on the Moon, Dates to Observe Objects on the Moon, 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 Aristoteles, Close to the Terminator - November 10, 2025
  • Complex Moon Crater Pythagoras - November 3, 2025
  • Theophilus, Cyrillus, Catharina Moon Craters West of Mare Nectaris - October 27, 2025
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