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Science 24 February 1978:
Vol. 199. no. 4331, pp. 875 - 877
DOI: 10.1126/science.199.4331.875
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Articles

Lunar Crater Giordano Bruno: A.D. 1178 Impact Observations Consistent with Laser Ranging Results

ODILE CALAME 1 and J. DERRAL MULHOLLAND 1

1 Centre d'Etudes et de Recherches Géodynamiques et Astronomiques, Grasse, France

The hypothesis of Hartung, that the impact formation of lunar crater Giordano Bruno (103° east, 36° north) was observed and recorded 800 years ago, is considered in the context of data from the Luna 24 mission and laser range observations. It is concluded that (i) the event would certainly have been visible, and (ii) current determinations of the free libration in longitude in the moon's rotation are consistent with the hypothesis. Such a study cannot prove Hartung's interpretation, but it is nonetheless supportive of it.

Submitted on September 19, 1977
Revised on November 29, 1977

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Science. ISSN 0036-8075 (print), 1095-9203 (online)