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Astronomer, Teacher, Musician

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Month: April 2026

Endymion – Moon Crater

Endymion crater from above the moon

The week of April 27 – May 3 takes us from Day 10 to Day 17. This week we will highlight the moon crater Endymion, visible on Saturday night close to the terminator. Endymion: [NE/D15; L=57°E] This is an older

Andrew Planck April 27, 2026April 21, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April No Comments Read more

Hercules and Atlas: Two Moon Craters Paired Due to Legend

Hercules on the moon

The week of April 20-26 takes us from Day 4 to Day 10.  This week we will highlight the moon craters Hercules & Atlas, visible on Tuesday night close to the terminator. Hercules and Atlas: These two moon craters are

Andrew Planck April 20, 2026April 20, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April No Comments Read more

Endymion – Older Moon Crater Which Resembles Plato

Endymion and coordinates on the moon

The week of April 13-19 takes us from Day 26 to Day 2.  This week we will highlight the moon crater Endymion, visible on Sunday night close to the terminator. Endymion: [NE/D15; L=57°E] This is an older moon crater which

Andrew Planck April 13, 2026April 8, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April, Moon craters No Comments Read more

Aristoteles Adjoins the Moon Crater Mitchell

Aristoteles Adjoins the Moon Crater Mitchell

The week of April 6 – April 12 takes us from Day 19 to Day 20. This week we will highlight the moon crater Eudoxus, visible on Tuesday night close to the terminator. Aristoteles: [NE/D11; L=17°E] Close to the terminator

Andrew Planck April 6, 2026April 1, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April 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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