Table of Contents

03 May 2013
Vol 340, Issue 6132

About The Cover

Cover image expansion

COVER Stylized comparison of the inner solar system (top) and Kepler-62 (bottom), a five-planet system about 1200 light-years away. Like our solar system, Kepler-62 hosts two planets in its habitable zone (depicted in green), the region around a star where a planet could conceivably maintain liquid water on its surface. The special section beginning on page 565 summarizes what we currently know about extrasolar planets. Illustration: NASA/Jet Propulsion Laboratory–Caltech/T. Pyle