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First and foremost is the coming superior conjunction of Venus with the sun, also known as a "transit of Venus" (no, this has nothing to do with bus rides for beauty queens
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This rare event occurs when the Sun, Venus and Earth lie directly in line and (usually) comes in pairs 8 years apart. It's due this year on 8 June- the last one was 121.5 years ago, and after 2012, you have to wait 105.5 years for the next one- so go out and see it!!!
The full course of the transit is visible in Euope and most of Asia and Africa (and of course in the land of the midnight sun). Korea, Japan and Australia see the first part prior to sunset. The final stages can be seen after sunrise in North America east of the Rockies. There's a good article in the May 2004 issue of Scientific American or vist http://www.transitofvenus.org.
If there's an observatory or Astronomy society near you, check with them- I'm sure they'll have some activities going.
G