High-precision radial velocities of Arcturus measured on 43 occasions from 1981 through 1985 show a 500 m s⁻¹ range. This range is much larger than the external errors of our observations (typically ...

A new instrument being built by the Harvard-Smithsonian Center for Astrophysics for use in the Canary Islands will help NASA's planet-scouting Kepler spacecraft confirm and characterize potential ...

A radial-velocity curve based on 17 McDonald Observatory coudé spectra shows the following results when compared with other velocities: (1) no variation in mean velocity, implying no detectable ...

On March 21, NASA announced the confirmation of the 5,000th planet outside our Solar System. From scorching-hot gas giants nestled near their parent star to rocky worlds that may host water on their ...