Venus is going across the sun, and is visible as a black, small, disc, moving across the sun. If you see this topic, go here:

http://venustransit.nasa.gov/webcasts/nasaedge/

for a live webcast of it. Apparently, this is a once-in-a-lifetime event.

I watched some of it. It was interesting. It is something that none of us that are on this forum will see again.

It is only a once in a lifetime event if you are planning on dying in the next 105 years. Personally I have no such plans. I have a lot of faith in clean living and modern medicine.

Having said that, it is a wonderful opportunity to see the cosmos in a new way.