JohnPi

If to take into consideration exoplanets, Ross 128 b is the MVP. It has the same size as Earth has, it's rocky and is orbiting within the inner habitable zone of the red dwarf Ross 128, at a distance of about 11 light-years from Earth. The planet is considered one of the most Earth-like worlds ever found in relation to its temperature, size and rather quiet host star. Ross 128 b is very close in mass to Earth, only about 35% more massive, and is likely around 10% larger in radius. Gravity on the planet would be only slightly higher. To cut a long story short, exoplanets are full of space facts But if we are still limited with our Solar system I think it could Europe, Jupiter's moon