The goal was to detect the wobble of 51 Peg in response to the gravitational pull of the supposed planet. Velocities of stars are derived from the Doppler effect, as a part of our long-term search for planetary systems. We find a period of 4.2 days which is presumably the orbital period of the unseen companion as it gravitationally pulls its host star around in a circle. We therefore confirm the sinusoidal velocity variations reported by Michel Mayor and Didier Queloz of Geneva Observatory. The orbital period of 4.2 days is exactly what they reported.
Many question remain unanswered.
This page contains some corrections to the factual material presented here which have been sent in my informed readers. In the temperature scaling arugment, a temperature of 300K was used. This is just an approximation. This has the effect of lowering the quoted temperature from 1200K to 1100K. 2. For rotating planets, a given latitude zone will heat up but then reradiate that heat over its full circumference.