(CNN) -- The Kepler space telescope was launched nine years ago to look for new planets in deep space. Scientists credit it for changing the way they think about other worlds that may be visited someday.
The spacecraft discovered more than 2,899 exoplanet candidates and 2,681 confirmed exoplanets in our galaxy, revealing that our solar system isn't the only home for planets. Some of the planets orbiting them may even have water and be able to support human life.
Kepler has depleted its fuel source and NASA will retire it within its current orbit; a safe distance away from earth.
The space agency launched a newer planet seeking telescope called the Transiting Exoplanet Survey Satellite, or TESS, back in April.
TESS is going to search 200-thousand stars for orbiting planets.