28 November 2008
Vol 322, Issue 5906

About The Cover

Cover image expansion

COVER Two direct detections of extrasolar planet candidates. Top: Keck Telescope colored infrared image of star HR 8799, for which the starlight is masked, showing three surrounding planets (red dots). Bottom: Superposed Hubble Space Telescope visible images from 2 years apart, tracing the orbit of a planet surrounding the star Fomalhaut. See pages 1345 and 1348. Images: Christian Marois/NRC Herzberg Institute of Astrophysics, Canada; Paul Kalas/University of California, Berkeley