its star, properties such as its radius, composition and temperature are unknown. With a mass half that of Saturn, 55 Cancri f is likely to be a gas giant with no solid surface. It orbits in the so-called "habitable zone," which means that liquid water could exist on the surface of a possible moon. It is not known if the composition and appearance is more like that of Saturn or Neptune. See also Appearance of extrasolar planets Cancer (Chinese astronomy) Lists of exoplanets Planetary system References External links 55 Cancri Cancer (constellation) Exoplanets discovered in 2005 Exoplanets detected by radial velocity Giant planets in the habitable zone Exoplanets with proper names