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Monthly Archive for: ‘April, 2011’

Supernova SN2011by was discovered by Zhangwei Jin, Ningbo, Zhejiang, China, and Xing Gao, Urumqi, Xinjiang, China on April 26, 2011.  SN2011by occured in NGC3972 in the constellation of Ursa Major.  Originally reported at magnitude 14.2 on April 26th, by May 1st, this had changed to magnitude 13. This image was taken on 29-04-2011, just 3 …

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Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They are caused by intense magnetic activity, which inhibits convection by an effect comparable to the eddy current brake, forming areas of reduced surface temperature. Like magnets, they also have two poles. Although they are …

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Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They are caused by intense magnetic activity, which inhibits convection by an effect comparable to the eddy current brake, forming areas of reduced surface temperature. Like magnets, they also have two poles. Although they are …

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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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Meton is a compound formation on the Moon that consists of several merged crater rings that have been flooded with lava, forming the remnant of a walled plain in the shape of a clover leaf. It is located near the northern lunar lumb, and is viewed from a low angle and foreshortened. The crater Barrow …

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Piccolomini is a prominent lunar impact crater located in the southeastern sector of the Moon. The crater Rothmann lies to the west-southwest, and to the south is Stiborius. The lengthy Rupes Altai begins at the western rim of Piccolomini, curving to the northwest. The crater is named after 16th century Italian Archbishop and astronomer Alessandro …

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