Free Astronomy Magazine January-February 2018

38 SPACE CHRONICLES nearby star to host such a temperate exoplanet. “This discovery is based on more than a decade of HARPS in- tensive monitoring together with state-of-the-art data reduction and analysis techniques. Only HARPS has demonstrated such a preci- sion and Closest temperate world orbiting quiet star discovered by ESO A team working with ESO’s High Accuracy Radial velocity Planet Searcher (HARPS) at the La Silla Observatory in Chile has found that the red dwarf star Ross 128 is orbited by a low-mass exo- planet every 9.9 days. This Earth- sized world is expected to be temperate, with a surface temperature that may also be close to that of the Earth. Ross 128 is the “qui- etest” JANUARY-FEBRUARY 2018