The special material is
Aluminum and Composite Fibre Reinforced Plastic
Carbon Fiber Reinforced
Polymer - CFPR
- has a very high strength for a
- reflects well heat
- does not rust
It may not be the best. But it is practically the most fitting
substance that can be used to optimized on multiple criteria.
The material has to be very strong to be
able to withstand the vibrations and pressure/stress due to atmosphere and high
velocity of the rocket through the atmosphere.
The material has to be as light as
possible, as heavier spacecraft is more difficult to carry and needs more
energy to maintain in space.
The material needs to withstand high
temperatures as Sunlight falls on it directly. Also, the radiation present in that location
should be tolerable by the material. The material should be able to
manage the dust and the atmospheric conditions around Mars in its orbit.