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  2. Atmosphere of Earth - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Earth

    The troposphere is the lowest layer of Earth's atmosphere. It extends from Earth's surface to an average height of about 12 km (7.5 mi; 39,000 ft), although this altitude varies from about 9 km (5.6 mi; 30,000 ft) at the geographic poles to 17 km (11 mi; 56,000 ft) at the Equator, [17] with some variation due

  3. Atmosphere - Wikipedia

    en.wikipedia.org/wiki/Atmosphere

    The composition of Earth's atmosphere is determined by the by-products of the life that it sustains. Dry air (mixture of gases) from Earth's atmosphere contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and traces of hydrogen, helium, and other "noble" gases (by volume), but generally a variable amount of water vapor is ...

  4. File:Watching the Earth Breathe.ogv - Wikipedia

    en.wikipedia.org/wiki/File:Watching_the_Earth...

    Original file (Ogg Theora video file, length 49 s, 1,920 × 1,080 pixels, 3.58 Mbps, file size: 20.78 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  5. Atmospheric science - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_science

    The composition of the Earth's atmosphere is different from the other planets because the various life processes that have transpired on the planet have introduced free molecular oxygen. [7] Much of Mercury's atmosphere has been blasted away by the solar wind. [8] The only moon that has retained a dense atmosphere is Titan.

  6. Planetary boundary layer - Wikipedia

    en.wikipedia.org/wiki/Planetary_boundary_layer

    Physical laws and equations of motion, which govern the planetary boundary layer dynamics and microphysics, are strongly non-linear and considerably influenced by properties of the Earth's surface and evolution of processes in the free atmosphere. To deal with this complexity, the whole array of turbulence modelling has been proposed. However ...

  7. See it: Origin of mysterious bright green light streaking ...

    www.aol.com/see-origin-mysterious-bright-green...

    As many as nine reports were filed with the agency after the fireball was sighted burning up as it entered Earth's atmosphere about 3:45 a.m ... sharing a video captured by their north-facing ...

  8. Homosphere - Wikipedia

    en.wikipedia.org/wiki/Homosphere

    A graph showing the seven largest component gases of the Earth's atmosphere. Relative concentrations maintain the same ratios from 0 to around 90 km (56 mi), represented by relatively horizontal lines. The crossing curves of the rightmost nine-tenths of the graph show how these ratios vary considerably at higher altitudes.

  9. Scientists confirm 'Earth-like' planet with atmosphere ... - AOL

    www.aol.com/news/2017-04-07-scientists-confirm...

    The discovery that GJ 1132b has an atmosphere is a key step in the search for life outside our solar system. Scientists confirm 'Earth-like' planet with atmosphere discovered 39 light-years from Earth