Schools' Moonwatch 2010
17 November 2010
The 11½-day-old waxing gibbous Moon is now north of the celestial equator and becoming more amenable
to observation. The morning terminator has pulled back to reveal young impact crater Kepler (32 km) in Oceanus
Procellarum, with its grey spindly splash of a ray system.
Now all of Mare Humorum is bathed by the morning sunlight,
along with it the magnificent crater Gassendi (114 km) on its northern border. For some reason Gassendi is the Moon’s
most frequently observed, sketched and imaged feature. Its floor contains a prominent cluster of central peaks and is
crossed with an intricate network of rilles, all easily visible through a 150 mm telescope.
In the southern uplands
the crater Schiller (184 km) is an intriguing sight – an elongated feature which gives the impression of being a crater
which was squashed from east to west.
Notes by Peter Grego