Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
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| Alphonsus |
A lunar crater, 118 kilometres 73 miles in diameter. A prominent ridge runs across the centre, almost along a north-south line, through a central peak about one kilometre high. Temporary reddish clouds were observed there in 1958 and 1959, possibly due to the release of gas from the rocks.
See also: transient lunar phenomenon.
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