The word preposterous means absurd, impossible. When you say something is preposterous, you are saying that it is impossible for that to be the case.
To obliterate something is to destroy it completely. If you obliterate a building, you completely destroy it.
To prosper is to do well, to be successful. When you prosper, you make a lot of money, or you achieve something that you wanted to achieve.
A revolutionizing event is something that changes the way that things are usually done. It can be something as small as a new fashion trend to a much bigger change like a political revolution.
An orbiter is a spacecraft that orbits a planet or moon. The orbiters are used to study the planet or moon.
evaporating means to disappear or to reduce in size. The water in the pool is evaporating, which is why the pool is getting smaller and smaller.
Terraforming is the process of modifying a planet or planet-like body so that it can be inhabited by human beings. This can involve things like changing the climate, changing the environment, and adding new plants and animals.
To sublime something is to make it more beautiful or sublime. When you sublime something, you make it more amazing or praiseworthy.
To thickens is to make something thicker. When you add milk to soup, for example, it thickens the soup.