Answer:
- Travelling from Earth to mass requires a greater magnitude of escape velocity in order to overcome the Earth's gravitational attraction.
- Travelling to Mars is a great distance which is approximately the twice of Earth's distance from the sun (approximately 3.0×10^11 m), hence the Traveller has a possibility of not reaching the destination.
- Travelling to Mars requires a skilled Traveller and experienced, yet those travellers are scarce allover the World.
- It is also very expensive.
- Mars has a different and a greater gravitational attraction than that of the earth, hence a person of earth may not cope with it.
-Mars is very hot than Earth, hence the living on it is affected by the climatic diversion