SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Transit of Venus. Diagrams drawn by Mikhail Lomonosov (1711-65), Russian astronomer and polymath, showing his observations of the transit of Venus. Figure 1 shows Venus at the edge of the solar disk (A), figures 4 and 5 show the 'arc' of light beyond the disk observed by Lomonosov. He attributed this to an atmosphere on Venus, the geometry of the refraction is explained in figure 7. This effect is now known as a Lomonosov arc in his honour. This was published in a monograph entitled 'The Appearance of Venus on The Sun, Observed at the St. Petersburg Imperial Academy of Sciences on May 26th 1761.
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