But the most surprising shift, according to aerospace-industry experts, is the way Starship will try to keep itself from burning up in the atmospheres of Mars and Earth.
Instead of relying on of thousands of heavy ceramic tiles to shield Starship from heat, as NASA did with its space shuttle, Musk says the spaceship will “bleed” rocket fuel through tiny pores to cool itself down.
In theory, putting liquid between Starship’s steel skin and the scorching-hot plasma generated while it plows through atmospheric gases would prevent the ship’s destruction.
Read the article here. Source: Elon Musk Says SpaceX Is Developing a Complex ‘Bleeding’ Heavy-Metal Rocket Ship