3 ms·
Venus' atmosphere is mostly carbon dioxide and sulphuric acid which is a far different composition than Earth's atmosphere. My guess is the heavier molecules th
by leptons 3y ago
Venus' atmosphere is mostly carbon dioxide and sulphuric acid which is a far different composition than Earth's atmosphere. My guess is the heavier molecules that make up the atmosphere are what makes it far denser than Earth, and gravity likely has much more to do with it than magnetism.
- dredmorbius 3y agoMars's atmosphere is also predominantly CO2, though far thinner. That's ... somewhat to be expected of any non-life-bearing rocky planet. Free oxygen is unstable, lighter elements (hydrogen, ammonia) would tend to boil off with either low gravity or (relatively) high temperatures (as opposed to the ice-moons of Jupiter and Saturn, especially Titan).