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, one to its north (Arago a [Alpha]) and one to its west (Arago b [Beta]). These are two of the largest and most prominent domes on the Moon, and halfway between Arago a and the crater Maclear (100 miles to its northeast) you will find a challenging group of four smaller domes. It will be a nice victory for you if you manage to spot them.


For you early birds, before the Sun rises on Friday, August 9, Mercury will be at its greatest elongation west of the Sun and around magnitude +0.2. It is reported that the great Copernicus himself never saw Mercury!

Jupiter and Saturn are well-placed for viewing above the southern horizon through September.



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
Arago Domes

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