a complete revolution / orbit of the earth around the sun takes 1 / one year / solar year / earth year
earth's_year has not 365_days earth_year is 365_days_long. earth's_year has 365_days earth is billions_of_years_old. universe has sun_and_earth sun is not over_5_billion_years_old. world is in_orbit_about_sun. sun is orbited_by_earth. earth is over_5_billion_years_old. sun is over_5_billion_years_old.