Kepler 442b

 

A Kepler-442b méretbeli összehasonlítá

Kepler 442b

Kepler 442b (ESI=0.84) is a planet 1.3 times the size of Earth discovered in 2015. It is orbiting a star cooler than the sun, about 1,100 light-years away. Its orbital period of 112 days places it in its star’s habitable zone, but with a surface temperature that could be as low as -40°C. However, by comparison, the temperature on Mars can be -125°C near its poles in the winter. Once again, the exoplanet’s mass is not known, but if it has a rocky composition, it may be only 2.3 times the mass of Earth.

Kepler-442b (also known by its Kepler object of interest designation KOI-4742.01) is a confirmed near-Earth-sized exoplanet, likely rocky, orbiting within the habitable zone of the K-type main-sequence star Kepler-442, about 1,206 light-years (370 parsecs), from Earth in the constellation Lyra. The planet was discovered by NASA's Kepler spacecraft using the transit method, in which the dimming eff...