Andrew Planck

Astronomer, Teacher, Musician

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Saturn

Montes Recti and the Collapse of the Arecibo Radio Telescope

Montes Recti and the Collapse of the Arecibo Radio Telescope

The week of December 7-13 takes us from Lunar Day 22 to Day 29. This week we will highlight Montes Recti, the Straight Range, viewable early Tuesday morning, and the collapse of the Arecibo radio telescope. The Straight Range is

Andrew Planck December 7, 2020December 6, 2020 Dates to Observe Objects on the Moon, Jupiter, Lunar Days in December, Radio Telescope, Saturn No Comments Read more

Rheita Valley: The Longest Distinct Valley on the Moon

Rheita Valley: The Longest Distinct Valley on the Moon

The week of March 23-29 takes us from Lunar Day 29 to Day 5. This week we will highlight the Rheita Valley, viewable in the evening on Saturday, March 28. Vallis Rheita: [SE/N14] At 276 miles, the Rheita Valley is

Andrew Planck March 23, 2020March 24, 2020 Dates to Observe Objects on the Moon, Lunar Days in March, Saturn, Valleys on the Moon No Comments Read more

Largest dome on the Moon: Valentine Dome

Largest dome on the Moon: Valentine Dome

The week of September 2-8 takes us from Day 4 to Day 10. This week we will highlight the Valentine Dome, viewable on Thursday evening. Valentine Dome: [NE/F11] Keep a close eye on the movement of the terminator, and when

Andrew Planck September 2, 2019September 2, 2019 Dates to Observe Objects on the Moon, Domes on the Moon, Jupiter, Lunar Days in September, Saturn, Volcanic Dome No Comments Read more

Arago Domes

Arago Domes

The week of August 5-11  takes us from Day 5 to Day 11. This week we will highlight the Arago domes viewable on Tuesday night. Arago domes: [NE/J12] Near the crater Arago there is a pair of very large domes,

Andrew Planck August 5, 2019August 5, 2019 Dates to Observe Objects on the Moon, Domes on the Moon, Jupiter, Lunar Days in August, Mercury, Saturn No Comments Read more

Moon Crater Messier: Pair of Splash Rays that Resemble the Tails of a Comet

Moon Crater Messier: Pair of Splash Rays that Resemble the Tails of a Comet

The week of Nov. 5-11 takes us from Day 28 (almost New Moon) to Day 4. This week we will highlight the crater Messier, viewable on Sunday during deep twilight (catch it before the Moon gets too low). Messier1: [SE/K14]

Andrew Planck November 5, 2018November 5, 2018 Craters on the Moon, Dates to Observe Objects on the Moon, Jupiter, Lunar Days in November, Saturn No Comments Read more

Complex of Domes and Lunar Swirls on the Moon

Complex of Domes and Lunar Swirls on the Moon

The week of June 25 – July 1 takes us from the end of Day 12, close to full moon, to Day 18. This week we will highlight Mons Rümker, viewable Monday, and the lunar swirl Reiner Gamma viewable all

Andrew Planck June 25, 2018June 25, 2018 Dates to Observe Objects on the Moon, Domes on the Moon, Lunar Days in June, Lunar Swirls, Saturn, Unusual Features on the Moon No Comments Read more

Concentric #MoonCraters and Endymion and Geminus

Concentric #MoonCraters and Endymion and Geminus

The week of April 2-8 takes us from Day 17 through Day 22, the beginning of the last quarter. This week we will highlight the craters Endymion and Geminus, viewable around midnight on Monday. Endymion: [NE/D15] This is an older

Andrew Planck April 2, 2018April 2, 2018 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April, Lunar Observers, Mars, Saturn No Comments Read more

Ghost Crater Lamont: Remnant of a Small Multi-Ring Impact Basin

Ghost Crater Lamont: Remnant of a Small Multi-Ring Impact Basin

The week of September 25 – October 1 takes us from Day 5 to Day 11, a very rewarding time to be observing the Moon. This week we will highlight the ghost crater Lamont, visible on Monday night late. Lamont:

Andrew Planck September 25, 2017September 25, 2017 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September, Saturn, Unusual Features on the Moon No Comments Read more

Valentine Dome on the #Moon

Valentine Dome on the #Moon

The week of April 17 – 23 takes us from Lunar Day 20 to 27, so the Moon would have to be viewed in the wee hours before sunrise. This week we will highlight what is informally called the Valentine

Andrew Planck April 17, 2017April 16, 2017 Lunar Days in April, Saturn No Comments Read more

Rupes Altai: Circular Mountain Range on Moon Whose Highest Peaks Rise to 13,000 Feet

Rupes Altai: Circular Mountain Range on Moon Whose Highest Peaks Rise to 13,000 Feet

The week of October 3rd – 9th takes us from the end of Lunar Day 2 to the beginning of Day 8, a very fruitful time for observing. This week we will highlight the Altai Scarp, visible on Thursday. Altai

Andrew Planck October 3, 2016October 3, 2016 Craters on the Moon, Lunar Days in October, Saturn No Comments Read more
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