Why the transit of Venus is so special

So I set my alarm for early this morning, looked out of the window at the rain clouds and then fired up the interweb to catch the humbling pictures of an actual planet passing  in front of the sun.

(The earth is only slightly larger than Venus. We are small indeed)

So enjoy the pictures, and this beautifully simple answer to the obvious question – “Why is this event so special”?

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