Since the discovery of the first exoplanet, a planet in orbit around a star other than the Sun, in 1995, over 4000 exoplanets have been discovered. How do we find exoplanets?
There are five main methods of discovering exoplanets.
Radial Velocity Method : Looking at stars dance and change colour.
Transit Method : Looking for the blinking stars.
Direct Imaging Method : Taking a picture of a planet.
Gravitational Microlensing Method : Light distortions through a lens.
Astrometry Method : Detecting tiny movements.