HELIOS at La Silla

HARPS (High Accuracy Radial velocity Planet Searcher) is a powerful planet-hunting instrument attached to the ESO 3.6-metre telescope at La Silla Observatory, Chile. 

HELIOS, seen in this image, is a solar telescope that was installed onto HARPS in 2018. HELIOS feeds sunlight via fibre optics to the HARPS spectograph, improving its exoplanet detection techniques while improving our understanding of stellar activity.