Water found on Neptune-sized world
HAT-P-11b is smallest exoplanet known to host the life-friendly molecule
![HAT-P-11b exoplanet illustration](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/09/cc_super-Neptune-planet.jpg?fit=860%2C460&ssl=1)
WATER, WATER EVERYWHERE Roughly the size of Neptune, the planet HAT-P-11b is the smallest known planet to have water. The orange glow of the planet’s sun (upper right in illustration) might lend a magenta tinge to the planet’s atmosphere.
David A. Aguilar/CfA