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Month: October 2019

Multi-Ring Imprint Result of Moon Crater Mare Crisium

Mare Crisium resulted from the impact of a large meteor 3.9 billion years ago. The event was energetic enough to leave a multi-ring imprint.

The week of October 28 – November 3 takes us from Day 1 to Day 7. This week we will highlight Mare Crisium, viewable on Thursday evening. Mare Crisium: [NE/H15] On Day 4 the Sea of Crises, the first of

Andrew Planck October 28, 2019October 26, 2019 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October No Comments Read more

Moon Crater Bullialdus: Floor Creates a Small Illusion

Bullialdus shares much of the same morphology in spite of being only half the size: a compound central mountain, eye-catching terraces, a flat floor, a thick ejecta blanket, and material in the immediate environs that rained back down after impact.

The week of October 21-27 takes us from Day 22 to 29. This week we will highlight the crater Bullialdus, viewable at 4:00 a.m. on Tuesday morning. Bullialdus: [SW/M7; L=22°W] If you recall what Tycho looked like yesterday morning, Bullialdus

Andrew Planck October 21, 2019October 20, 2019 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October No Comments Read more

The Great Eastern Chain on the Moon

The week of October 14-20 takes us from Day 15 to 21. This week we will highlight a feature commonly referred to as The Great Eastern Chain, viewable on Monday evening. The Great Eastern Chain: [SE/K-N16] There is a conspicuous

Andrew Planck October 14, 2019October 13, 2019 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October, Rilles on the Moon No Comments Read more

Pytheas Secondary Moon Craters and the Moon Crater Copernicus

Pytheas secondary craters and the moon crater Copernicus

The week of October 7-13 takes us from Day 9 to Day 14. This week we will highlight the Pytheas secondary craters and the crater Copernicus, viewable on Monday and Tuesday evenings. Pytheas secondary craters: [NW/G7-8] The best place to

Andrew Planck October 7, 2019October 7, 2019 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October 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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