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  2. Wikipedia:Vital articles/Level/5/Geography - Wikipedia

    en.wikipedia.org/.../Level/5/Geography

    Download as PDF; Printable version; In other projects Wikidata item; Appearance. move to sidebar hide Level 5 Sublists. This page was ... Level 5 Sublists

  3. Medium Earth orbit - Wikipedia

    en.wikipedia.org/wiki/Medium_Earth_orbit

    Clickable image, highlighting medium altitude orbits around Earth, [a] from Low Earth to the lowest High Earth orbit (geostationary orbit and its graveyard orbit, at one ninth of the Moon's orbital distance), [b] with the Van Allen radiation belts and the Earth to scale To-scale diagram of low, medium, and high Earth orbits Space of Medium Earth orbits (MEO) as pink area, with Earth and the ...

  4. List of orbits - Wikipedia

    en.wikipedia.org/wiki/List_of_orbits

    Tundra orbit: A synchronous but highly elliptic orbit with significant inclination (typically close to 63.4°) and orbital period of one sidereal day (23 hours, 56 minutes for the Earth). Such a satellite spends most of its time over a designated area of the planet .

  5. Near-Earth object - Wikipedia

    en.wikipedia.org/wiki/Near-Earth_object

    If a near-Earth object is near the part of its orbit closest to Earth's at the same time Earth is at the part of its orbit closest to the near-Earth object's orbit, the object has a close approach, or, if the orbits intersect, could even impact the Earth or its atmosphere.

  6. Geology of solar terrestrial planets - Wikipedia

    en.wikipedia.org/wiki/Geology_of_solar...

    The most abundant silicate minerals on the Earth's surface include quartz, the feldspars, amphibole, mica, pyroxene, and olivine. [25] Common carbonate minerals include calcite (found in limestone), aragonite, and dolomite. [26] Elevation histogram of the surface of the Earth—approximately 71% of the Earth's surface is covered with water.

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  8. Humus - Wikipedia

    en.wikipedia.org/wiki/Humus

    Humus is the Latin word for "earth" or "ground". [2] In agriculture, "humus" sometimes also is used to describe mature or natural compost extracted from a woodland or other spontaneous source for use as a soil conditioner. [3] It is also used to describe a topsoil horizon that contains organic matter (humus type, [4] humus form, [5] or humus ...

  9. Wikipedia : Vital articles/Level/5/Physical sciences/Earth ...

    en.wikipedia.org/.../Physical_sciences/Earth_science

    Vital articles is a list of subjects for which Wikipedia should have corresponding high-quality articles. It serves as a centralized watchlist to track the status of Wikipedia's most essential articles.