HARPSNG
HARPSNG, or the High Accuracy Radial velocity Planet Searcher, North-Gemini, is a spectrograph designed to detect exoplanets by observing the radial velocity of stars. It is an upgraded version of the original HARPS instrument, which has been highly successful in discovering thousands of exoplanets. HARPSNG is installed on the Gemini North telescope in Hawaii, a powerful instrument that allows for highly precise measurements of a star's light.
The principle behind HARPSNG is the Doppler effect. As a planet orbits a star, its gravitational pull
HARPSNG's increased sensitivity and resolution compared to its predecessor enable it to detect smaller planets and