Andrew Planck

Astronomer, Teacher, Musician

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arcuate rilles

Moon Crater Hippalus: Finest Examples of Arcuate Rilles

Moon Crater Hippalus: Finest Examples of Arcuate Rilles

The week of May 29 – June 4 takes us from Day 10 to Day 16. This week we will highlight the Hippalus rilles, viewable on Tuesday evening. Rimae Hippalus: [SW/M6; L=29°W] On the east shore of Mare Humorum you

Andrew Planck May 29, 2023May 20, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in May, Rilles on the Moon No Comments Read more

Moon Crater Hippalus – Finest Examples of Arcuate Rilles

Moon Crater Hippalus – Finest Examples of Arcuate Rilles

This week we will highlight the Hippalus rilles on the moon, viewable early Wednesday morning, and the Leonid meteor shower. Rimae Hippalus: [SW/M6] On the east shore of Mare Humorum, you will find the remnant of the moon crater Hippalus,

Andrew Planck November 14, 2022November 9, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in November, Rilles on the Moon 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)
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  • Albategnius – How to Observe This Stunning Moon Crater Near the Terminator - June 30, 2025
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