Kepler-69c
Distance: 2,430 Lightyears
Star: Kepler-69
Constellation: Cygnus
Kepler-69c was discovered by the Kepler Spacecraft on April 18, 2013. This was considered a “transit discovery” due to the spacecraft using a photometer. This is an instrument developed by NASA that’s used to detect potential transit events. This can be discovered when a planet crosses in front of its host star, dimming it for specific periods of time.
We know Kepler-69c orbits the Kepler-69 host star every 242 days. It’s seemingly rocky like Earth and appears to have liquid water. When discovered, it quickly became a contender for planets that could house human life one day. However, further study has been done since its discovery. It is thought that there is a runaway greenhouse effect on the surface. If true, this means most water would have boiled away by now. Temperatures would have risen to 120 degrees Fahrenheit on average and could easily be compared to Venus. Surface pressure is likely also around 100 times that of Earth. While Kepler-69c could still be a possible life contender, it is not the most prime candidate at this point.