Overview of the habitability of exoplanets several factors of habitability

By analyzing the data of the earth and the sun, we get some of the factors of a planets habitability, such as the distance from the star to the planet, the atmosphere, and the tidal locked effect. We use the equation of radiative equilibrium and get the orbital semi-major axis in terms of the stars radius and the planets temperature and albedo. Then, according to the data of the planet and the definition of habitat zone, we can get the range of the habitat zone. We find that the relationship between the radius of the star and the planets radius is the radius of the stars surface, the temperature of the planets surface, and the albedo. We also discussed how the albedo, the star mass, the composition of the atmosphere, and the tidal lock influence the planets habitability. In conclusion, the only factor of the habitability of a planet is not the distance from the sun to the planet, we need to consider more factors and re-examine the habitability of the planets.