![]() The fourth and fifth stages will send the rocket back to Earth. Multiple parachutes must be used when descending on Mars. A low-thrust engine must be used and some fuel and heat shields to land safely on Mars. The third stage can make it to the surface of Mars. This stage can also slow down the rocket into Mars orbit. A vacuum engine should be used ( Valiant for smaller and lighter payloads Frontier for more efficiency and larger and heavier payloads). The second stage will get the rocket to parking orbit and perform a trans-Martian injection. Boosters may be required for more TWR if the rocket is heavy. The first stage will bring the rocket to a suborbital trajectory. A Mars rocket requires at least 2 stages, three or four if you are conducting a return mission.
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