Latest Issue of Science News


Riddles on Titan

Two puzzles have emerged from the Cassini spacecraft's first close flyby of Saturn's hydrocarbon-shrouded moon Titan (SN: 11/06/04, p. 291: Available to subscribers at Titanic Close-up: Cassini eyes Saturn's big moon). Radar images from the Oct. 26 passage, which recorded just 1 percent of the moon's surface, show no obvious sign of craters. That's a surprise because Titan, the solar system's second-largest moon after Jupiter's Ganymede, is likely to have been pummeled by debris roaming the outer solar system.

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.

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