{"id":"src_9bd7r4zz1anv","title":"A Jupiter-mass companion to a solar-type star","authorName":"Michel Mayor, Didier Queloz","abstract":"The presence of a Jupiter-mass companion to the star 51 Pegasi is inferred from observations of periodic variations in the star's radial velocity. The companion lies only about eight million kilometres from the star, which would be well inside the orbit of Mercury in our Solar System.","tags":["exoplanets","51 pegasi","radial velocity","astronomy","planetary systems"],"priceUSDC":"0.0003"}