The first exoplanet discovered around a sun-like star, 51 Pegasi b made us question what we knew of our universe and launched the … Two Planet Profile - 51 Pegasi b. uploaded by Jelly. 51 Pegasi b, the first extrasolar planet confirmed to orbit a sunlike star.The planet orbits a fifth-magnitude star, 51 Pegasi, located 48 light-years away from Earth in the constellation Pegasus. Properties of Sun-Like Stars with Planets 51 Pegasi, 47 Ursae Majoris, 70 Virginis, and HD114762 1997 HENRY G., BALIUNAS S., DONAHUE R., SOON W., & SAAR S. Apj., 474, 503 paper. 51 Pegasi, fifth-magnitude star located 48 light-years away from Earth in the constellation Pegasus, the first sunlike star confirmed to possess a planet. Absence of a planetary signature in the spectra of 51 Pegasi.