Deep Impact

If the only difference between men and boys is the price of their toys - the guys at NASA are real men!

Sure they've got a couple of bazillion dollar remote-control cars on Mars to play with, but real boys like to blow stuff up, too. How about a comet! Deep Impact is NASA's mission to frag (literally) comet Tempel 1. Here's the high points...

Launched in January (this year) it's travelled about 260 million miles and picked up the target last month. It's approaching fast for a July 4th encounter. And by encounter we mean smacking it at 23,000 miles per hour with an 800 pound copper missile to blast a stadium-size hunk out of the comet.

Two weeks ago top men at NASA made some course adjustments to make the impact better visible from Earth. After all, what good is blowing things up if you can't watch, right.

Wohba will bring you the fireworks.