PlanetPol
PlanetPol was a ground-based, high sensitivity
detection of extrasolar planets.[1]
Results
PlanetPol did not discover any extrasolar planets, however it was used to provide upper limits to planetary albedos in the known 55 Cnc and τ Boo planetary systems.[2] Observations with the polarimeter in the Canary Islands, which are affected by dust from the Sahara, also identified airborne dust as a source of polarization within our atmosphere.[3] Additionally, PlanetPol provided measurements of the polarization of a few dozen nearby stars,[4] which were later combined with southern hemisphere measurements from PlanetPol's successor, HIPPI,[5] to provide information about the nature of those stars and the distribution of the interstellar medium.[6]
References