Clavius

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Clavius

(ˈkleɪvɪəs)
n
(Astronomy) one of the largest of the craters on the moon, about 230 kilometres (145 miles) in diameter, whose walls have peaks up to 5700 metres (19 000 feet) above the floor. It lies in the SE quadrant
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Christopher Clavius, a German astronomer, advised Pope Gregory that the Julian calendar was off by 3 days every 400 years.
Among their missions was a strong emphasis on education; and thanks to the efforts of Christopher Clavius, their mathematical teachings were firmly established on the principles of Euclidian geometry.
(When the calendar needed another tune-up by 1582, Pope Gregory turned to Aloysius Lilius and Christopher Clavius, duly cratered in VI Octans.) Manilius is next door for his epic poem Astronomica.
At one end of the spectrum of attitudes toward Galileo was Christopher Clavius, S.J.
1612 Christopher Clavius died; a German mathematician; in 1581 was employed by Pope Gregory XIII to reform the calendar.
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