4 ms·

Thicker, or denser? Or did you mean thick as in cake batter and not size? As far as I can tell, Earth's atmosphere seems to extend further into space than Venu

• chmod775 3y ago
  > As far as I can tell, Earth's atmosphere seems to extend further into space than Venus'. Depends on where you want to draw the line for "atmosphere". About 100km out is where the word "pressure" starts becoming near-meaningless on Earth, while on Venus you'd still have about three times as much to work with.
• shiroiushi 3y ago
  >As far as I can tell, Earth's atmosphere seems to extend further into space than Venus'. Technically, Earth's atmosphere extends infinitely far into space. It's not like there's some force-field holding it in; it just gets less and less dense with altitude. So the line depends on your definition, which must be some threshold. Anyway, Venus has about 90% of the gravity of Earth, so with 92x as much pressure at the surface (of a slightly smaller solid body), I think it stands to reason that at any given altitude, Venus's atmosphere has much higher density than Earth's. If Venus had far higher gravity, then this might not be the case at some altitude, but since its gravity is lower, then Earth's meager atmosphere should show slightly greater stratification I would think.
  • bmitc 3y ago
    That doesn't follow. Planets are dynamical systems, not globs of material in situ. For example, Earth has a more substantial magnetosphere, which protects the atmosphere being blown completely away by the Sun.