“The planet is located about 110 million miles (177 million km) from its sun, a type K star that’s dimmer and cooler than ours…It’s located in an area crucial for the formation of planets, the so-called frost line. This is the special distance where the temperature is cold enough for ice grains to form. Any closer to the host star and these grains would be boiled off. But at or beyond the frost line, these ice grains can stick together and form planetary embryos which go on to form gas giants.”
For the first time, Kepler discovers an exoplanet near the frost line, which may help us better understand the formation of worlds. “[The frost line] explains why our gas giants are rich in ice and water, any why the rocky planets (Mercury, Venus, Earth, and Mars) began their existence as very dry worlds; water only arrived later via comets.”
