Whenever a planet passes in front of its parent star, it blocks the some of the starlight which causes a dim in the brightness. Kepler records the brightness of these stars every 30 minutes and the data is beamed to the Earth.
Sometimes finding planets become extremely difficult when they are orbiting far away from its parent star. These planets infrequently pass in front of the star. It is not only difficult for scientists but also for computer algorithms to identify them.
So these planets can only be identified with the collective intelligence of people from all over the world. Together human brains can recognize signals from these data and identify new planets and classify them according to their nature.
As an internet user, you can alongside thousands of planet hunters towards finding planets using the Kepler data. These data consists of brightness curves or light curves from more than 150,000 stars taken for every 30 minutes.
Users on the planet hunters website search for a dip in brightness curve which denotes a transit event. The dip in brightness curve occurs when the planet passes in front of its parent star.
The team at planet hunters will assist you in finding the planets by providing you the exact methods used by scientists at NASA to identify the planets. Since 1995, more than 500 exoplanets have been discovered using different techniques.
Results suggest that half of the stars in the sky have planets orbiting around them. Now its time to start hunting! Visit Planet Hunters.
Zooniverse offers various space science projects for volunteers to help scientists dealing with large amounts of space data. Other projects include: