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

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Science  24 Feb 1978:
Vol. 199, Issue 4331, pp. 875-877
DOI: 10.1126/science.199.4331.875


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.

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