– Which planet has the atmosphere with the greatest number of kilograms of oxygen? Atmosphere. Magnetosphere. Mercury's iron core generates a magnetic field about one percent as strong as Earth's. Answer: Only two planets have detectable oxygen: Earth and Mercury. This atmosphere is not stable—atoms are continuously lost and replenished from a variety of sources. Land, water, and other surfaces can repeatedly re-emit mercury into the atmosphere after its initial release into the environment. Mercury's axis of rotation is tilted just 2 degrees with respect to … What are the gases in Uranus' atmosphere and percentages? Mercury is too small for its gravity to retain any significant atmosphere over long periods of time; however, it does have a tenuous atmosphere containing hydrogen, helium, oxygen, sodium, calcium and potassium. Because it lacks a viable atmosphere, Mercury has no way to retain the heat from the Sun. Instead of an atmosphere, Mercury possesses a thin exosphere made up of atoms blasted off the surface by the solar wind and striking meteoroids. Space and astronomy news. By comparison, With the exception of Mercury, which has a very thin atmosphere, the high-percentage objects are the largest bodies in the solar system. The atmosphere of Earth is the layer of gases, commonly known as air, ... Fifty percent of the total mass of the atmosphere is located in the lower 5.6 km (3.5 mi; 18,000 ft) of the troposphere. Hydrogen and helium atoms probably come from the solar wind, diffusing …

Mercury makes a complete orbit around the Sun (a year in Mercury time) in just 88 Earth days. One Mercury solar day (one full day-night cycle) equals 176 Earth days—just over two years on Mercury. Mercury - Mercury - The atmosphere: A planet as small and as hot as Mercury has no possibility of retaining a significant atmosphere, if it ever had one. Mercury's thin atmosphere is constantly being "blown away" into space by the pressure of sunlight and by the solar wind. Though mercury has the highest percentage of oxygen making up its atmosphere, the number of kilograms of oxygen is only 1000 kg x 0.42 = 420 kilograms. The objects with the least percentage are Venus, Earth, Moon, Mars, Titan, Pluto. The amount of gas is measured in trillionths of a percent of the amount in our atmosphere (so if you were standing on the surface of Mercury you couldn’t tell there was any air there at all, without sensitive measuring tools). Nearly all atmospheric water vapor or moisture is found in the troposphere, so it is the layer where most of Earth's weather takes place. There is a very thin atmosphere around the planet. Universe Today. We know that anthropogenic emissions continue to add significantly to the global pool of mercury.

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