The week of September 30 – October 6 to takes us from Day 2 to Day 8. This week we will highlight the craters Dawes, Moltke and Arago, viewable on Friday evening, Day 6.

3 moon craters - Dawes. Moltke, AragoDawes1: [NE/H12] Positioned in the straits between Tranquillity and Serenity is the small 11-mile crater Dawes. Some observers say it has a small central peak, others do not. What do you think?

Moltke: [NE/K12] Just south of the Apollo 11 site is Moltke (4 miles in diameter—about 4 arc-seconds), a perfect example of a simple crater with a smooth bowl.

Arago: [NE/J12] About 50 miles from the western shore of Tranquillity you will find the crater Arago (16 mi.). This is an unusual crater. In the place of a central peak you will see a substantial ridge that extends from the center of Arago’s floor to its northern rim. The evidence suggests that there was a significant collapse of rim material which simply merged with the central peak.


Friday, October 4th, marks the 62nd anniversary of Sputnik, the first successful launching of a satellite into outer space by the Soviet Union in 1957.

1Of Dawes Limit fame.


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 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]

Courtesy of Gray Photography of Corpus Christi, Texas
Lunar photos: NASA / USGS / BMDO / LROC / ASU / DLR / LOLA / Moon Globe. Used by permission

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
Explore 3 Moon Craters and the Anniversary of Sputnik
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