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  2. Earth-centered, Earth-fixed coordinate system - Wikipedia

    en.wikipedia.org/wiki/Earth-centered,_Earth...

    The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass.

  3. Geocentric model - Wikipedia

    en.wikipedia.org/wiki/Geocentric_model

    A few Orthodox Jewish leaders maintain a geocentric model of the universe based on the aforementioned Biblical verses and an interpretation of Maimonides to the effect that he ruled that the Earth is orbited by the Sun. [57] [58] The Lubavitcher Rebbe also explained that geocentrism is defensible based on the theory of relativity, which ...

  4. Geocentric orbit - Wikipedia

    en.wikipedia.org/wiki/Geocentric_orbit

    Geocentric orbits with altitudes at apogee higher than 100 km (62 mi) and perigee that intersects with the defined atmosphere. [8] Low Earth orbit (LEO) Geocentric orbits ranging in altitude from 160 km (100 mi) to 2,000 km (1,200 mi) above mean sea level. At 160 km, one revolution takes approximately 90 minutes, and the circular orbital speed ...

  5. Latitude - Wikipedia

    en.wikipedia.org/wiki/Latitude

    The geocentric latitude θ is the complement of the polar angle or colatitude θ′ in conventional spherical polar coordinates in which the coordinates of a point are P(r,θ′,λ) where r is the distance of P from the centre O, θ′ is the angle between the radius vector and the polar axis and λ is longitude.

  6. Astronomy - Wikipedia

    en.wikipedia.org/wiki/Astronomy

    Planetary science is the study of the assemblage of planets, moons, dwarf planets, comets, asteroids, and other bodies orbiting the Sun, as well as extrasolar planets. The Solar System has been relatively well-studied, initially through telescopes and then later by spacecraft. This has provided a good overall understanding of the formation and ...

  7. List of superseded scientific theories - Wikipedia

    en.wikipedia.org/wiki/List_of_superseded...

    The obsolete geocentric model places Earth at the centre of the Universe. This list includes well-known general theories in science and pre-scientific natural philosophy and natural history that have since been superseded by other scientific theories.

  8. Fundamental plane (spherical coordinates) - Wikipedia

    en.wikipedia.org/wiki/Fundamental_plane...

    The geocentric latitude of a point is then the angle between the fundamental plane and the line joining the point to the centre of the sphere. [1] For a geographic coordinate system of the Earth, the fundamental plane is the Equator. Astronomical coordinate systems have varying fundamental planes: [2]

  9. Geodetic coordinates - Wikipedia

    en.wikipedia.org/wiki/Geodetic_coordinates

    Geodetic latitude and geocentric latitude have different definitions. Geodetic latitude is defined as the angle between the equatorial plane and the surface normal at a point on the ellipsoid, whereas geocentric latitude is defined as the angle between the equatorial plane and a radial line connecting the centre of the ellipsoid to a point on the surface (see figure).

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