When Planets Cross the Sun – 26th May 2011
When Planets Cross the Sun – 26th May 2011

When Planets Cross the Sun – 26th May 2011

Tony Sizer gave a talk with the title When Planets Cross the Sun at our May meeting. In it he explored the history of the predictions and observations of transits of Mercury and Venus, explaining their importance in determining things like the distances between the Sun and the planets, and including many stories of expeditions mounted to observe these relatively infrequent events.