Andrew Planck

Astronomer, Teacher, Musician

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Triesnecker Rilles on the Moon: A Complex System Resembling a Railway Switchyard

Triesnecker Rilles on the Moon: A Complex System Resembling a Railway Switchyard

The week of April 4-10 takes us from Day 4 to Day 9. This week we will highlight the Triesnecker rilles on the moon and an object informally known as the “Lunar X.” Triesnecker Rilles: [NE/J10] What a great place

Andrew Planck April 4, 2022April 3, 2022 Dates to Observe Objects on the Moon, Lunar Days in April, Rilles on the Moon, Unusual Features on the Moon No Comments Read more

The Lunar X and Moon Crater Maurolycus

The Lunar X and Moon Crater Maurolycus

The week of November 8-14 takes us from Day 5 to Day 11. This week we will highlight the moon crater Maurolycus and a feature informally referred to as “The Lunar X,” both viewable on Thursday evening, Day 8. Maurolycus:

Andrew Planck November 8, 2021November 8, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in November No Comments Read more

Where Angels Fear to Tread: Moon Crater Maurolycus

Where Angels Fear to Tread: Moon Crater Maurolycus

The week of May 17-23 takes us from Lunar Day 6 to Day 12. This week we will highlight the crater Maurolycus, viewable on Tuesday evening, Day 7. Maurolycus: [SE/P11] Let us venture briefly into a region where angels fear

Andrew Planck May 17, 2021May 16, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in May 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)
  • Complex Moon Crater Pythagoras - November 3, 2025
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  • Moon Crater Humboldt Best Viewed When Pronounced Libration - October 20, 2025
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