Water Ice Found on Comet’s Exterior

Scientists, studying data from NASA’s Deep Impact mission have found the first evidence that water ice can exist on a comet’s exterior. In a report in an online edition of the journal Science, researchers found that the surface of Comet Tempel 1 has three small pockets of water ice. The same team previously reported that Tempel 1’s interior also contained an abundance of organic material and suggested the comet may have originated in a region of the solar system now occupied by Uranus and Neptune. Several theories of how life originated on Earth involve comets containing critical components actually colliding with Earth. Checkout Space.com for all the details.