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Clouds partially obscure the sun during the transit of Venus June 5, 2012 as seen from Riverside Park on the west side of Manhattan in New York. Astronomers around the world are training their telescopes on the skies to watch Venus pass in front of the Sun, a once-in-a-lifetime event that will not be seen for another 105 years. AFP PHOTO/Stan HONDA

In pictures: The spectacular transit of Venus

Stargazers from across the globe looked on in awe as Venus passed in front of the sun - a once-in-a-lifetime spectacle that won't be observed again for another 105 years. The closing stages of the phenomenon were briefly visible over the UK from 5.37am today.

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