About this world
Kepler-437 b is a sub-Neptune orbiting Kepler-437, an orange dwarf 992 light-years from Earth. It is about 2.1 times the size of Earth. It completes an orbit every 66.7 days at 0.29 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 308 K (35 °C): too cold for liquid water on its surface. By the "cosmic shoreline", it has likely held on to an atmosphere.
It was discovered in 2015 by transit with Kepler. A planet crosses its star and dims it by a tiny, periodic fraction.