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  2. List of orbits - Wikipedia

    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 International Space Station, Hubble Space Telescope and Iridium constellation orbits, and the nominal size of the Earth. [a] The Moon's orbit is around 9 times larger (in radius and length) than ...

  3. List of natural satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_natural_satellites

    Earth has one Moon, the largest moon of any rocky planet in the Solar System and the largest body typically described as a moon that orbits anything in hydrostatic equilibrium in relation to the primary object by mass and diameter other than Charon and Pluto, the latter two being dwarf planets revolving around each other. Earth also has more ...

  4. Natural satellite - Wikipedia

    en.wikipedia.org/wiki/Natural_satellite

    The seven largest natural satellites in the Solar System (those bigger than 2,500 km across) are Jupiter's Galilean moons (Ganymede, Callisto, Io, and Europa), Saturn's moon Titan, Earth's moon, and Neptune's captured natural satellite Triton. Triton, the smallest of these, has more mass than all smaller natural satellites together.

  5. High Earth orbit - Wikipedia

    en.wikipedia.org/wiki/High_Earth_orbit

    Space of high Earth orbits (HEO), between medium Earth orbits (MEO) and the orbit of the Moon. A high Earth orbit is a geocentric orbit with an apogee farther than that of the geosynchronous orbit, which is 35,786 km (22,236 mi) away from Earth. [1] In this article, the non-standard abbreviation of HEO is used for high Earth orbit. [2]

  6. Geocentric orbit - Wikipedia

    en.wikipedia.org/wiki/Geocentric_orbit

    A geocentric orbit, Earth-centered orbit, or Earth orbit involves any object orbiting Earth, such as the Moon or artificial satellites. In 1997, NASA estimated there were approximately 2,465 artificial satellite payloads orbiting Earth and 6,216 pieces of space debris as tracked by the Goddard Space Flight Center . [ 1 ]

  7. Orbit - Wikipedia

    en.wikipedia.org/wiki/Orbit

    An animation showing a low eccentricity orbit (near-circle, in red), and a high eccentricity orbit (ellipse, in purple). In celestial mechanics, an orbit (also known as orbital revolution) is the curved trajectory of an object [1] such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such ...

  8. China launches signal relay satellite for mission to moon's ...

    www.aol.com/news/china-launches-satellite...

    The moon's near side always faces Earth. That means data transfers from the far side are impossible as there is no direct line of sight. ... first astronauts on the moon. The satellite is expected ...

  9. List of objects at Lagrange points - Wikipedia

    en.wikipedia.org/wiki/List_of_objects_at...

    EarthMoon L 2: CNSA: Launched on 23 October 2014, arrived at L 2 halo orbit on 13 January 2015. [2] Queqiao: EarthMoon L 2: CNSA: Launched on 21 May 2018, arrived at L 2 halo orbit on June 14 for Chang'e 4 mission. [38] Queqiao is the first ever communication relay and radio astronomy satellite at operating its location. [39] Spektr-RG ...

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