Planet puzzles in nearby star system

Planet puzzles in nearby star system

Pictured: An artist’s impression of the trio of super-Earths discovered by a European team using the HARPS spectrograph on the ESO 3.6-metre telescope at La Silla, Chile, after 5 years of monitoring. The three planets, having 4.2, 6.7, and 9.4 times the mass of...