Latest Issue of Science News


Feature

A Grand Slam

In a winning move, NASA probe burrows into a comet

The first fireworks this July 4 came from space. At 1:52 a.m. Eastern time, a 372-kilogram copper projectile released from NASA's Deep Impact spacecraft slammed into Comet Tempel 1, producing an incandescent flash. After a second flash a second or so later, the comet belched debris moving at 180 kilometers per hour in a fan-shaped pattern.

Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.

X
This article is available only to subscribing members. Join SSP today or Log in.