An artist’s depiction of the stellar system Kepler-9 and two of its planets. Astronomers have confirmed the very low densities of two of Kepler-9’s planets using both transit-timing and radial velocity methods. NASA, Jet Propulsion Laboratory/California Institute of Technology, Ames Research Center The Kepler mission and its extension, called K2, […]

Seth Shostak/SETI Institute Breakthrough Listen—the astronomical program searching for signs of intelligent life in the Universe—has submitted two publications to leading astrophysics journals, describing the analysis of its first three years of radio observations and the availability of a petabyte of radio and optical telescope data. This represents the largest […]