Discovering Exoplanets

A star's slight wobble, caused by a large planet's gravitational pull, allows astronomers to measure light changes through the Doppler effect. This phenomenon was key to discovering 51 Pegasus b, an exoplanet orbiting extremely close to its star, which ignited a surge of interest and innovation in exoplanet detection methods. The transit method, where a planet dims a star's light as it passes in front, emerged as a powerful technique in this groundbreaking field.