17 September

Sir William Herschel, 1738 - 1822
27 FEB. 2004 publication date 2151 Views

1789: On 17 September 1789, Sir William Herschel, the German-born British astronomer discovered Saturn's moon Mimas.

The surface of Mimas is dominated by an impact crater 130 kilometres across (almost one third of the diameter of the entire moon), called Herschel in honour of the moon's discoverer.


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View of the  Moon by Star Tracker Camera
Armagh Observatory
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