HARPS-N
HIGH-PRECISION RADIAL-VELOCITY SPECTROGRAPH
High Accuracy Radial Velocity Planet Searcher for the Northern Hemisphere
HARPS-N, the High Accuracy Radial velocity Planet Searcher for the Northern hemisphere is a high-precision radial-velocity spectrograph, installed at the Italian Telescopio Nazionale Galileo, a 3.58-metre telescope located at the Roque de los Muchachos Observatory on the island of La Palma, Canary Islands, Spain.