Sci / Tech / Climate

One of these rings is not like the others

In a recently published study, Cassini scientists report that one section of Saturn’s rings appears to have been running a slight fever during its equinox in 2009. The higher-than-expected temperature provided a unique window into the interior structure of ring particles.





Hitchhiking on comets

A concept called Comet Hitchhiker, developed at NASA’s Jet Propulsion Laboratory, Pasadena, Calif., puts forth a new way to get into orbit and land on comets and asteroids, using the kinetic energy — the energy of motion — of these small bodies.