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According to a legend M. Lomonosov observed this event on 1761.06.05 in order to determine diurnal parallax. He failed to get precise measurements, but claimed that that the first and fourth contacts were fuzzy and there was a halo around the Venus disk. He attributed it to the presence of Venus atmosphere. His note was considered as the first experimental evidence that the Venus has atmosphere. To tell the true, I did not see fuzziness of the contacts. Now I have some doubts about validity of this discovery.

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