A page from the Philosophical transactions of the Royal Society of London (1770) with observations by Samuel Dunn of the 1769 transit of Venus.  A transit occurs when Venus passes directly between the Earth and the Sun. Though Venus passes between the Earth and the Sun every 584 days, for an observer on Earth it usually appears to be either above or below the sun.  Between 1600 and 2000 C.E. only six transits occurred, but there are two this century; the first June 8, 2004 and the second is tommorrow, June 5th, 2012! NASA has more information on observing the transit safely, as well as a live webcast!  http://venustransit.nasa.gov/2012/transit/index.php (via Chasing Venus: Observing the Transits of Venus, 1631-2004)

A page from the Philosophical transactions of the Royal Society of London (1770) with observations by Samuel Dunn of the 1769 transit of Venus.  A transit occurs when Venus passes directly between the Earth and the Sun. Though Venus passes between the Earth and the Sun every 584 days, for an observer on Earth it usually appears to be either above or below the sun.  Between 1600 and 2000 C.E. only six transits occurred, but there are two this century; the first June 8, 2004 and the second is tommorrow, June 5th, 2012!

NASA has more information on observing the transit safely, as well as a live webcast!  http://venustransit.nasa.gov/2012/transit/index.php

(via Chasing Venus: Observing the Transits of Venus, 1631-2004)

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    (via Chasing Venus: Observing the Transits of Venus, 1631-2004)
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