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  2. Thermosphere - Wikipedia

    en.wikipedia.org/wiki/Thermosphere

    The thermosphere contains an appreciable concentration of elemental sodium located in a 10-kilometre (6.2 mi) thick band that occurs at the edge of the mesosphere, 80 to 100 kilometres (50 to 62 mi) above Earth's surface. The sodium has an average concentration of 400,000 atoms per cubic centimeter.

  3. Exosphere - Wikipedia

    en.wikipedia.org/wiki/Exosphere

    Diagram showing the five primary layers of the Earth's atmosphere: exosphere, thermosphere, mesosphere, stratosphere, and troposphere.The layers are to scale. From the Earth's surface to the top of the stratosphere (50km) is just under 1% of Earth's radius.

  4. List of tectonic plates - Wikipedia

    en.wikipedia.org/wiki/List_of_tectonic_plates

    Map showing Earth's principal tectonic plates and their boundaries in detail. These plates comprise the bulk of the continents and the Pacific Ocean.For purposes of this list, a major plate is any plate with an area greater than 20 million km 2 (7.7 million sq mi)

  5. Ionosphere - Wikipedia

    en.wikipedia.org/wiki/Ionosphere

    Relationship of the atmosphere and ionosphere. The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) [1] [2] is the ionized part of the upper atmosphere of Earth, from about 48 km (30 mi) to 965 km (600 mi) above sea level, [3] a region that includes the thermosphere and parts of the mesosphere and exosphere.

  6. Thermopause - Wikipedia

    en.wikipedia.org/wiki/Thermopause

    The thermopause is the atmospheric boundary of Earth's energy system, located at the top of the thermosphere. [1] The temperature of the thermopause could range from nearly absolute zero to 987.547 °C (1,810 °F).

  7. Heterosphere - Wikipedia

    en.wikipedia.org/wiki/Heterosphere

    The volume fraction of the main gases in Earth's atmosphere according to height. The heterosphere is above about 100 km in the graph. The heterosphere of Earth begins at about 100 km altitude and extends to the outer reaches of its atmosphere. [3] It incorporates most of the thermosphere and all of the exosphere. The major constituents of Earth ...

  8. Homosphere - Wikipedia

    en.wikipedia.org/wiki/Homosphere

    It incorporates all of the troposphere, stratosphere, mesosphere, and the lower part of the thermosphere. Chemically the homosphere is composed of 78% nitrogen, 21% oxygen, and trace amounts of other molecules, such as argon and carbon dioxide. [1] It contains over 99% of the mass of the Earth's atmosphere.

  9. Space weather - Wikipedia

    en.wikipedia.org/wiki/Space_weather

    The GOES spacecraft have carried an X-ray sensor (XRS) which measures the flux from the whole solar disk in two bands – 0.05 to 0.4 nm and 0.1 to 0.8 nm – since 1974, an X-ray imager (SXI) since 2004, a magnetometer which measures the distortions of the Earth's magnetic field due to space weather, a whole disk EUV sensor since 2004, and ...

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