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Monthly Archive for: ‘August, 2011’

G. J. Garradd (Siding Spring Observatory, Australia) discovered this comet on four images obtained between 2009 August 13.77 and August 13.81. He was using the 0.5-m Uppsala Schmidt telescope and a CCD camera. The magnitude was given as 17.5-17.7 and the coma was described as circular and 15″ across. The first confirmation was obtained by …

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The famously named “Ring Nebula” (also catalogued as Messier 57, M57 or NGC 6720) appears in the northern constellation of Lyra and is located in the Carina–Sagittarius Arm. It is one of the most prominent examples of a planetary nebula, the gaseous remains of red giant star that has ended its life by expelling its …

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Due to the location of the crater toward the southern limb, the crater appears oblong due to foreshortening. Because of its great size, Clavius can be detected with the unaided eye. It appears as a prominent notch in the terminator about 1-2 days after the Moon reaches first quarter. The crater is one of the …

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Heraclitus is a complex lunar crater that lies in the rugged southern highlands of the Moon. The crater Licetus forms the northern end of the formation. Just to the east is Cuvier, and due south is Lilius. Just to the west of Heraclitus is the small satellite crater Heraclitus K, to the south of which …

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Drygalski is a large lunar impact crater that lies along the southern limb of the Moon. It partly overlies the crater Ashbrook to the west on the far side of the Moon. Just to the north of Drygalski is the smaller Boltzmann. The location of this crater restricts its observation from the Earth, and even …

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Hipparchus is an ancient crater that has been subject to considerable modification due to subsequent impacts. The western rim of Hipparchus has been all but worn away from impact erosion, and only low hills and rises in the surface remain to outline the feature. The wall to the east is somewhat more intact, but it …

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Mons Hadley is a massif in the northern portion of the Montes Apenninus, a range in the northern hemisphere of the Moon. It has a height of 4.6 km and a maximum diameter of 25 km at the base. To the southwest of this mountain is a valley that served as the landing site for …

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Plato is the lava-filled remains of a lunar impact crater on the moon. It is located on the northeastern shore of the Mare Imbrium, at the western extremity of the Montes Alpes mountain range. In the mare to the south are several rises collectively named the Montes Teneriffe. To the north lies the wide stretch …

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Spooky shapes seem to haunt this starry expanse, drifting through the night in the royal constellation Cepheus. Of course, the shapes are cosmic dust clouds faintly visible in dimly reflected starlight. Far from your own neighborhood on planet Earth, they lurk at the edge of the Cepheus Flare molecular cloud complex some 1,200 light-years away. …

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