The most well known exoplanet may be kepler 452-b as astronomers describe it as the most similar to Earth that has ever been found!
And here is a bit more on exoplanets and their discoveries to date from wikipedia:
An exoplanet or extrasolar planet is a planet that orbits a star other than the Sun. Over 2000 exoplanets have been discovered since 1988 (2062 planets in 1310planetary systems including 507 multiple planetary systems as of 5 February 2016).
What do you think they will find as they plan further telescope views of kepler 452-b? It’s atmosphere appears to be very similar to Earth. And the advent of a tool called starshades may make it more viewable as it filters out brightness from planets orbiting stars (as most do).
Feel free to comment with your ideas.
thanks to sciencenews.org for the great info
And check out another cool video on the search for extraterrestrials on the next page