Transits of Venus occur rarely, in pairs 8 years apart, at intervals of 121.5 and 105.5 years. The next Venus transit visible on our planet will be in 2117. Venus is clearly visible against the bright solar background.
♀ Transit of Venus
June 5, 2012
Chaco Culture National Historical Park, NM
Photograph of projected telescope image
Transits of Mercury are seen more frequently than transits of Venus: about thirteen occur each century. The planet Mercury is much smaller than Venus and further from Earth, and is barely visible as a tiny black dot in this picture.
☿ Transit of Mercury
May 9, 2016
Spanish Valley, Moab, UT
Cyanotype on cotton paper