Add Yahoo as a preferred source to see more of our stories on Google. On January 12, 2005, NASA launched its Deep Impact mission to crash into comet Tempel 1, also known as 9P/Tempel. Two spacecraft ...

Perhaps unusual for a big-budget sci-fi flick, Dr. Chapman strongly approved of the film’s science, and both he and Y — an environmental activist and artist who donates to the B612 Foundation — said ...