That dot is the planet Venus!
It is currently the Transit of Venus!
The event is very rare and extremely cool for a physics nerd like me.
A little background:
The Transit of Venus is a very rare astronomical event that occurs in pairs of eight years, about every hundred years (2004, 2012, 2117, 2125)
It only lasts about 6 hours every time. This year's started at 3 PM and should end at 9 PM
A map to show you where it is currently visible:
If you live in those areas, get out there and watch it now! If you missed it, or if you live somewhere where it is invisible, here is a live broadcast!
2004's Transit of Venus:
Current Transit of Venus
If anyone knows how to embed a video on CDC, post how here so I can embed the video in the OP
Edited by UMADBRO?, 05 June 2012 - 06:32 PM.