Planetary Science

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Orbits diagram

PLANETARY ALIGNMENT A giant planet (orange) could explain why the orbits of the six most distant objects from the sun (magenta) line up in a peculiar way.

heart of world

EARTH’S GUTS  A new book explains how decades of scientific research have revealed Earth’s interior structure thousands of kilometers deeper than humans have ever ventured.

Philae

PHILAE DESCENDING  After a rough landing on comet 67P in November 2014, the Philae probe (illustrated) will probably permanently shut down soon as temperatures on the comet plummet. 

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