Fig 3 - uploaded by Hans Jelitto
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The photos of the Sun are rotated in such a way that the apparent motion of the Sun due to the Earth rotation becomes horizontal.
Source publication
Primarily, this presentation is a compilation related to the Mercury transit on May 9, 2016. Such a transit means that the planet Mercury passes in front of the solar disk as seen from the Earth. This happens about 13 to 14 times per century. However, these transits cannot always be observed, because daytime is needed and the sky should not be cove...