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Description
This day in space history.
On 5 December 2001, a European initiative called the Astrophysical Virtual Observatory (AVO) was launched to give astronomers instant access to the vast databanks being built up by the world's observatories and forming what is, in effect, a 'digital sky'.
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On 6 December 1631, the transit of Venus occurred as first predicted by Kepler. He correctly predicted that a transit of Venus would occur but nobody observed it due to the fact that it occurred after sunset for most of Europe. He not only predicted this particular transit but also worked out that transits of Venus involve a cyclic period of approximately 120 years(!!!!)- transits of Venus are among the rarest of predictable astronomical phenomena A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and a superior planet, becoming visible against the solar disk. During a transit, Venus can be seen from Earth as a small black disk moving across the face of the Sun.

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Description
This day in space history.
On 5 December 2001, a European initiative called the Astrophysical Virtual Observatory (AVO) was launched to give astronomers instant access to the vast databanks being built up by the world's observatories and forming what is, in effect, a 'digital sky'.
_____________________________________________________________________________________________________-
On 6 December 1631, the transit of Venus occurred as first predicted by Kepler. He correctly predicted that a transit of Venus would occur but nobody observed it due to the fact that it occurred after sunset for most of Europe. He not only predicted this particular transit but also worked out that transits of Venus involve a cyclic period of approximately 120 years(!!!!)- transits of Venus are among the rarest of predictable astronomical phenomena A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and a superior planet, becoming visible against the solar disk. During a transit, Venus can be seen from Earth as a small black disk moving across the face of the Sun.

SEE ALSO: