Enveloping is a word that is used to describe something that is very warm and comfortable. When you say that something is enveloping, you mean that it is very comforting and relaxing.
astronomically is used to describe something that is very strange or out of the ordinary. When you say that something is astronomically high, you mean that it is very high in comparison to what is normal.
Refiners are companies or people that are in the business of turning crude oil into products that people can use.
Unfurling means to open up or to spread out. When the flag is unfurled, it is raised to the top of the pole and allowed to flap in the wind.
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.