Hot space projects produce cool cosmic discoveries

NASA, ESA and others' spacecraft and telescopes find new planet, make sense of old ones and solve cosmic mysteries

All hail Saturn: NASA's Cassini spacecraft flew in low across Saturn's moon Titan and scientists have determined from that flyby the distribution of materials in the moon's interior. According to NASA subtle gravitational tugs the flyby measured suggest the interior has been too cold and sluggish to split completely into separate layers of ice and rock. The finding, to be published in the March 12 issue of the journal Science, shows how Titan evolved differently from planets such as Earth, or icy moons such as Jupiter's Ganymede, whose interiors have split into distinctive layers.

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