earth's orbit wikipedia - EAS

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  1. 365.256 days
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    One complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million km (584 million mi). Ignoring the influence of other Solar System bodies, Earth's orbit is an ellipse with the Earth-Sun barycenter as one focus and a current eccentricity of 0.0167.
    One com­plete orbit takes 365.256 days (1 side­real year), dur­ing which time Earth has trav­eled 940 mil­lion km (584 mil­lion mi). Ig­nor­ing the in­flu­ence of other Solar Sys­tem bod­ies, Earth's orbit is an el­lipse with the Earth-Sun barycen­ter as one focus and a cur­rent ec­cen­tric­ity of 0.0167.
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    What is a low Earth orbit?
    Low Earth orbit (LEO): Geocentric orbits with altitudes up to 2,000 km (0–1,240 miles ). Medium Earth orbit (MEO): Geocentric orbits ranging in altitude from 2,000 km (1,240 miles) to just below geosynchronous orbit at 35,786 kilometers (22,236 mi).
    en.wikipedia.org/wiki/Orbit
    What is a medium Earth orbit?
    Medium Earth orbit (MEO): Geocentric orbits ranging in altitude from 2,000 km (1,240 miles) to just below geosynchronous orbit at 35,786 kilometers (22,236 mi). Also known as an intermediate circular orbit. These are "most commonly at 20,200 kilometers (12,600 mi), or 20,650 kilometers (12,830 mi), with an orbital period of 12 hours."
    en.wikipedia.org/wiki/Orbit
    What is a high Earth orbit?
    High Earth orbit: geocentric orbits above the altitude of geosynchronous orbit (35,786 km or 22,236 mi). For Earth orbiting satellites below the height of about 800 km, the atmospheric drag is the major orbit perturbing force out of all non-gravitational forces. Above 800 km, solar radiation pressure causes the largest orbital perturbations.
    en.wikipedia.org/wiki/List_of_orbits
    What is the difference between Earth's orbit and a circle?
    Earth orbit (yellow) compared to a circle (gray) Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), and one complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million km (584 million mi). Earth's orbit has an eccentricity of 0.0167.
    en.wikipedia.org/wiki/Earth%27s_orbit
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    https://en.wikipedia.org/wiki/Earth's_orbit

    Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi) in a counterclockwise direction as viewed from above the Northern Hemisphere. One complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million km (584 million mi). … 查看更多內容

    Heliocentrism is the scientific model that first placed the Sun at the center of the Solar System and put the planets, including Earth, in its orbit. Historically, heliocentrism is opposed to geocentrism, which placed … 查看更多內容

    By astronomical convention, the four seasons are determined by the solstices (the two points in the Earth's orbit of the maximum tilt of the Earth's axis, toward the Sun or away from the Sun) and the equinoxes (the two points in the Earth's orbit where the … 查看更多內容

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    Events in the orbit圖片

    Because of Earth's axial tilt (often known as the obliquity of the ecliptic), the inclination of the Sun's trajectory in the sky (as seen by an observer on Earth's surface) varies over the course … 查看更多內容

    Mathematicians and astronomers (such as Laplace, Lagrange, Gauss, Poincaré, Kolmogorov, Vladimir Arnold, and Jürgen Moser) … 查看更多內容

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  4. https://en.wikipedia.org/wiki/Orbit

    • Low Earth orbit (LEO): Geocentric orbits with altitudes up to 2,000 km (0–1,240 miles).
    • Medium Earth orbit (MEO): Geocentric orbits ranging in altitude from 2,000 km (1,240 miles) to just below geosynchronous orbit at 35,786 kilometers (22,236 mi). Also known as an intermediate circular orbit. These are "most commonly at 20,200 kilometers (12,600 mi), or 20,650 kilometers (12,830 mi), with an orbital period of 12 hours."

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    • 預估閱讀時間: 9 分鐘
    • 發行日期: 2022年12月22日
  5. https://simple.wikipedia.org/wiki/Earth's_orbit

    The Earth's orbit takes about 365 days, this is also called a year. This means that in 365 days (a year) the Earth has gone around the Sun. [a] From this we can find that the orbital speed of …

    • 預估閱讀時間: 1 分鐘
    • https://en.wikipedia.org/wiki/Medium_Earth_orbit

      A medium Earth orbit (MEO) is an Earth-centered orbit with an altitude above a low Earth orbit (LEO) and below a high Earth orbit (HEO) – between 2,000 …

      • 預估閱讀時間: 5 分鐘
      • https://en.wikipedia.org/wiki/List_of_orbits

        Comparison of geostationary Earth orbit with GPS, GLONASS, Galileo and Compass (medium Earth orbit) satellite navigation system orbits with the …

        • 預估閱讀時間: 9 分鐘
        • https://en.wikipedia.org/wiki/Geostationary_orbit

          A geostationary orbit, also referred to as a geosynchronous equatorial orbit [a] ( GEO ), is a circular geosynchronous orbit 35,786 km (22,236 mi) in altitude above Earth's equator (42,164 km (26,199 mi) in radius from Earth's center) …

        • https://en.wikipedia.org/wiki/Outer_space

          Cislunar space is a region outside of Earth that includes lunar orbit, the Moon's orbital space around Earth and the Lagrange points. [95] xGeo space is a concept used by the US to refer to space of High Earth Orbits , ranging from …

        • https://en.wikipedia.org/wiki/Low_Earth_orbit

          A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25.[1] Most of the artificial objects in outer space are in LEO, with an altitude never …

        • High Earth orbit - Wikipedia

          https://en.wikipedia.org/wiki/High_Earth_orbit

          A high Earth orbit is a geocentric orbit with an altitude entirely above that of a geosynchronous orbit (35,786 kilometres, 22,236 mi). The orbital periods of such orbits are greater than 24 …

        • https://wiki2.org/en/Earth's_orbit

          2022年10月23日 · Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi) in a counterclockwise direction as viewed from above the Northern Hemisphere. One …



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