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A primary atmosphere is an atmosphere of a planet that forms by accretion of gaseous matter from the accretion disc of the planet's sun. Planets such as Jupiter and Saturn have primary atmospheres. Primary atmospheres are very thick compared to secondary atmospheres like the one found on Earth. The primary atmosphere was lost on the terrestrial ...
- On Earth, we live in the troposphere, the closest atmospheric layer to Earth’s surface. “Tropos” means “change,” and the name reflects our constantly changing weather and mixture of gases.
- Mars has a very thin atmosphere, nearly all carbon dioxide. Because of the Red Planet’s low atmospheric pressure, and with little methane or water vapor to reinforce the weak greenhouse effect (warming that results when the atmosphere traps heat radiating from the planet toward space), Mars’ surface remains quite cold, the average surface temperature being about -82 degrees Fahrenheit (minus 63 degrees Celsius).
- Venus’ atmosphere, like Mars’, is nearly all carbon dioxide. However, Venus has about 154,000 times more carbon dioxide in its atmosphere than Earth (and about 19,000 times more than Mars does), producing a runaway greenhouse effect and a surface temperature hot enough to melt lead.
- Jupiter likely has three distinct cloud layers (composed of ammonia, ammonium hydrosulfide and water) in its "skies" that, taken together, span an altitude range of about 44 miles (71 kilometers).
Jun 27, 2022 · It is likely that planets that retain their primordial atmosphere still have varying degrees of metallicity compared with solar metallicities. Also, the relative abundances of elements will vary.
Jun 27, 2022 · The idea that liquid water could exist underneath a primordial atmosphere is not new 1.However, so far, only a few studies have focused on this concept of ‘alternative habitable conditions’ 2 ...
All the planets and quite a few other worlds in the Solar System have an atmosphere of some sort. Whether thick and blanketing like Venus or Jupiter, life-supporting like Earth’s, or wispy like Mercury’s, atmospheres are part of the complex processes that make each world unique.
Apr 12, 2023 · The implied D/H of the primordial atmosphere source is similar to that for Uranus and Neptune and greater than the solar value (Extended Data Fig. 5), allowing for some late additions of H 2 O to ...
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Sep 27, 2016 · All coupled magma-atmosphere models, even the most recent ones (Lebrun et al. 2013; Hamano et al. 2013) have used a global mean column (1D) atmospheres since the surface conditions for magma ocean planets are not thought to depend strongly on the location on the planet (e.g. in latitude or local solar time). Moreover, the numerical solution of 1D models is much faster and therefore more ...
