1 of 22: Hong Kong stargazers use special sunglasses to observe the transit of Venus along the Victoria Habour in Hong Kong Wednesday, June 6, 2012. Stargazers around the world are setting up special telescopes and passing out cardboard eclipse glasses to view the once-in-a-lifetime celestial cameo of Venus passing in front of the sun. (AP Photo/Vincent Yu) (AP Photo/ Vincent Yu)

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