Kepler-438b

Kepler-438b (also known by its Kepler Object of Interest designation KOI-3284.01) is a confirmed near-Earth-sized exoplanet, likely rocky, orbiting within the habitable zone of the red dwarfKepler-438, about 470 light-years (145 pc) from Earth in the constellation Lyra. The planet was discovered by NASA's Kepler spacecraft using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured. NASA announced the confirmation of the exoplanet on 6 January 2015. It is the most Earth-like exoplanet known to date.

Kepler 438b is 475 light years from Earth, so travelling there is presently impossible. The German-designed Helios probes, notable for having set the current speed record among spacecraft at 252,792 km/h, would take 2,029,278 years to travel to Kepler 438b.

Confirmed exoplanet

Kepler-438b is a near-Earth-sized exoplanet with a radius 1.12 times that of Earth. The planet orbits the red dwarf Kepler-438, a star considerably smaller and cooler than the Sun, once every 35.2 days.