1769: Transit of Venus: American Philosophical Society Essays

by David Rittenhouse and John Ewing

The ToV occurs when Venus's orbit causes the planet to speed past the slower moving Earth and visibly cross the Sun, partially obscuring it. The ToV occur in pairs that are 8 years apart and tend to be separated in time by just over a century. The first person to predict and observe the ToV was James Horrocks, on Dec. 4, 1639. There were also ToV observed and recorded in 1761, 1769, 1874 and 1882. The 2012 ToV will be visible in the Americas on the...

• Format: Paperback
• Language: English
• ISBN: 1606188917
• ISBN13: 9781606188910
• Release Date: January 2012
• Publisher: American Philosophical Society Press
• Length: 88 Pages