Ok people have this wide imagination that humans one day will live in another planet let's take Mars because some people beleive that mars is the planet that human may live at in the future first of all let's begin with the atmosphere
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As you can see 96% of atmosphere is CO2 which means there can not be life there in mars and people won't be able to breath etc they will eventually die but let's skip the atmosphere lets say humans found a way to reach mars you need a specific time in the year were earth is close to mars and NASA sends robot To mars during this time ok but since there is no such a thing called spaceship but lets say after 100 years there is an space ship and it reached mars and landed first of all if human traveled from earth to Mars not within the specific time or month in the year it will take 50years to reach mars ad when the human land on mars they can never goo back to earth they will stay at mars forever and eventually die even if they got all the food in the world they will die and there will never be life in mars its just facts it dosent matter how much science gets we will never be able to live at another planet specially in our solar system and if we ever found a planet that is the same as earth it's probably million years away soo we will never ever be able to live in another planet we will stay at earth forever and die in earth thank you for your time.