Bonus

It seems, from this AP story via the SF Chronicle, that we might be in for some bonus pyrotechnics on the Fourth of July.

The Hubble Space Telescope will be watching when the University of Maryland's Deep Impact space probe crashes into a comet July 4, setting off a cosmic firework that may be visible on Earth.

Deep Impact, launched January 12th, will release an "Impactor" to collide with the the Manhattan-sized comet and create a crater expected to be about the size of a stadium. The rest of the spacecraft will fly on by and record the impact with cameras and other high-tech instruments. How cool.