The most Earth-like planet we’ve ever come across has been, well… come across. It’s 3-4 times bigger than our cozy little space marble, and it takes 37 earth days to orbit around it’s red dwarf sun. One side is always facing it’s sun, so the most livable place would be the line in between the light and dark side. Also, the alien life found on it looks a lot like us, just 9 feet tall and blue. The natives have been dubbed “Na-vi”.
I made up one part of that last body of text. Which part it is though, will surprise you.