If you’re looking for a little more power in your Independence Day holiday fireworks, consider taking a look at NASA’s Deep Impact website.
The Deep Impact mission involves a NASA space probe set on a collision course with Comet Tempel 1. The probe will fire an “impactor” at the comet in order to aid scientists in studying exactly what makes up the interior of a comet.
For those with broadband, you can also catch video and multimedia presentations on the mission at NASA TV. More information on the project can also be found at Wikipedia.