California & Carnegie Planet Search

Two Neptune-Mass Planets Discovered

NSF Press Release
NASA Announcement
Planet Graphics

A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ436
Butler et. al., to appear in Dec 2004 ApJ

Detection of a Neptune-Mass Planet in the 55 Cancri System by the HET
McArthur et. al., to appear in Dec 2004 ApJ

155 planets are known outside our
Solar System (June 13, 2005).

Almanac of Planets
Planet Research
Our SIM Key Science Project
Team Members
General Information

We gratefully acknowledge support from: NASA, NSF, and Sun Microsystems.