hmm potentially, yes. If the gravity of the planet isn’t strong enough, then the air would drift off into space, so in that case you might need some sort of dome to contain the air.
I’ll have a think about this one some more.
Not an expert on this, but the term “terraforming” of a planet, moon, or other body is the hypothetical process of deliberately modifying its atmosphere, temperature, surface topography or ecology to be similar to the environment of Earth to make it habitable by Earth-like life.
This is usually something found in science fictions rather than actual science so far, but as we start to visit planets like Mars more, this may be something that NASA and others are working on?
I think it would take a lot of trial and error to create the right atmosphere for us. As Leo says, the gravity would be different to ours but also the temperature and the types of gas that exist there currently. We would have to do some experiments to see how the gases that we introduce would react with the ones that are already there. For example, at the right temperature, adding oxygen to a hydrogen rich environment could give us water rather than oxygen – handy perhaps but not an atmosphere!
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