Smallest exoplanet
- Who
- Kepler 37b
- What
- 1930 total number
- Where
- Not Applicable
- When
- 20 February 2013
Kepler 37b is a planet orbiting the star Kepler 37, around 210 light years from Earth in the constellation of Lyra. Its discovery by NASA’s Kepler spacecraft was announced on 20 February 2013. Kepler 37b is only around 1,930 km across, smaller than the planet Mercury.