The transit of Venus and the Royal Society in Pepys's time
- Here is a pretty good article on the transit.
James Gregory and Edmond Halley were FRS whom Pepys knew.
Horrocks' publications were known in Pepys's time and acknowledged by Newton.
Concern in the Royal Society in about the determination of the "parallax" of the Earth's orbit to determine the motion of the Earth, including Sandwich's observations in Spain of an eclipse.