![Astronomers using data from NASA Kepler mission and ground-based telescopes recently discovered the three smallest exoplanets known to circle another star, called KOI-961.01, KOI-961.02 and KOI-961.03.](https://images-assets.nasa.gov/image/PIA15258/PIA15258~large.jpg?w=1920&h=853&fit=clip&crop=faces%2Cfocalpoint)
Sizing Up Exoplanets
Astronomers using data from NASA Kepler mission and ground-based telescopes recently discovered the three smallest exoplanets known to circle another star, called KOI-961.01, KOI-961.02 and KOI-961.03.
TakenJanuary 11, 2012
ProducerJPL
Size1920x853px
PIA NumberPIA15258