| The Doppler shift caused by wobble in light curves of star with surrounding planets. In this instance Lick Observatory , 51 Pegasi-50 light years from Earth--0.051 AU from parent star to planet. In constellation, Pegasus, the star 51 Pegasi is a yellow dwarf similar in size and structure to the Earth's own Sun. Because of closeness to its parent, this was the first example of a 'hot Jupiter' in size and relative proximity. |