An American-built planet-hunting space probe is being called a great success.
The probe was launched from Cape Canaveral on a mission not only to find planets but to find habitable ones where life could exist.
The mission began in March 2009.
Kepler, the planet-hunting space probe, cannot go so far as finding life, but it can find planets.
And it found more than 2,300 of them -- many of those are considered habitable.
Kepler has discovered the first rocky planet orbiting a sun-like star and has logged many other firsts.
Scientists have only studied about half the data sent down by the probe so far.
They are still chasing an elusive goal: finding a planet that has a one-year orbit around 90 million miles from a sun-like star.
In other words, another Earth.