All Transit of Mercury Pages:
- https://sites.williams.edu/transitofmercury/
- 2016 Transit of Mercury
- 2019 Transit of Mercury
- https://sites.williams.edu/pasachoff/transit-of-mercury/
Transits of Venus
Inferior conjunction of Venus in 2020
Near Miss, 4 June 2020, at inferior conjunction
(look near the top of this coronagraph frame in this 7-second time-lapse)
https://twitter.com/RyanJFrench1/status/1268483418859413504
from the High Altitude Observatory’s K-coronagraph at the Mauna Loa Solar Observatory, at 11,000 foot altitude in Hawaii
Venus Transit Movies 
Inferior conjunction 2020 by Nicolas Lefaudeux
William Tobin 2013 article on transits of Venus and Mercury in Art
http://articles.adsabs.harvard.edu/pdf/2013JAHH…16..224T – PDF