The week of September 3-9 takes us from Day 23 to Day 0 (New Moon). This week we will highlight the Capuanus lunar domes and the Kies Π (Pi) dome, viewable early Tuesday morning.

KiesKies Π (Pi): [SW/M7] Sandwiched in between Bullialdus and Rima Hesiodus (which you observed on August 20) you will find one of the Moon’s best examples of a lunar dome, Kies Π. Being located below the conspicuous crater Bullialdus and just west of the flooded crater Kies, it is one of the easiest domes to find. It is 7 miles in diameter, but because it is only 500 feet high you must catch it under a very low Sun (which will be the case early Tuesday morning). With luck, good optics, and a steady atmosphere you might be able to make out the 0.8 mile summit pit at the top. Most lunar domes occur in groups, so Kies Π is something of an oddity.

CapuanusCapuanus: [SW/N7] South of Kies Π, just off the south shore of Palus Epidemiarum, is the lava-filled crater Capuanus that displays several low domes on its surface. They should be easy objects for an eight-inch telescope. Domes are not usually found within craters, so this is also an oddity.


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
The Moon’s Best Examples of a Lunar Dome

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