The Moon Guide
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The phase of the Moon right now

Phase
 
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Schools' Moonwatch 2010


Dorsa Smirnov Credit Peter Grego
Dorsa Smirnov
12 November 2010 Although the Moon is still pretty low in the southwestern sky this evening, it’s worth taking a look at its more noteworthy features. Craters Aristoteles (90 km) and Eudoxus (70 km) in the north form the most prominent features along the 6½-day-old Moon’s terminator.

It’s a good time to view Mare Serenitatis (Sea of Serenity) in more detail; note how patchy it appears, with areas of different tone sharply separated from each other. You may also notice several low ‘wrinkle ridges’ on the surface of this mare, including the large Dorsa Smirnov, known as the Serpentine Ridge.

The phase shown this evening is comparable to that when Apollo 11 landed on the Moon over 40 years ago, on 21 July 1969. You can actually see the landing site location, Tranquillity Base, in southwestern Mare Tranquillitatis (Sea of Tranquillity), just to the east of the twin craters Ritter (32 km) and Sabine (31 km).
Apollo 11 Landing site
Apollo 11 Landing site


Lots of detail can be seen in the crater-crowded southern region of the Moon. To the west of Mare Nectaris (Sea of Nectar) the conjoined trio of big craters Theophilus (104 km), Cyrillus (100 km) and Catharina (104 km) are easily seen – note how the younger Theophilus overlaps its neighbour Cyrillus.

Another overlapping crater can be seen emerging from the southern terminator – Maurolycus (114 km) along with its neighbour Barocius (82 km) almost completely overlap another large (unnamed) crater.

Notes by Peter Grego

Reference map
1 Aristoteles; 2 Eudoxus; 3 Mare Serenitatis; 4 Dorsa Smirnoff; 5 Sabine and Ritter; 6 Mare Nectaris; 7 Theophilus, Cyrillus and Catharina; 8 Maurolycus and Barocius. For a larger map go to http://www.popastro.com/moonwatch/moon_guide/moonmap.html


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Mare Crisium
Mare Crisium

MoonWatch evenings

10–11 November 2010

12 November 2010

13 November 2010

14 November 2010

15 November 2010

16 November 2010

17 November 2010

18 November 2010

Jupiter Watch 2010
 
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