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Animations of the Solar System's outer planets orbiting. This animation is 100 times faster than the inner planet animation. The planets and other large objects in orbit around the Sun lie near the plane of Earth's orbit, known as the ecliptic. Smaller icy objects such as comets frequently orbit at significantly greater angles to this plane.
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Orbits Mercury in yellow; For reference a circular orbit with the same semi-major axis in grey; The orbit plotted in brighter colours above the ecliptic and darker below. Major axis drawn showing perihelion (q) and aphelion (Q) Mercury Positions show every 5 days before and after the perihelion on May 20, 2006
Date/Time Thumbnail Dimensions User Comment; current: 16:42, 25 August 2010: 672 × 1,328 (8 KB): Icalanise: Fixed description: should say HD 10180, not Gliese 876
Geosynchronous (and geostationary) orbits have a semi-major axis of 42,164 km (26,199 mi). [10] This works out to an altitude of 35,786 km (22,236 mi). Both complete one full orbit of Earth per sidereal day (relative to the stars, not the Sun). High Earth orbit: geocentric orbits above the altitude of geosynchronous orbit (35,786 km or 22,236 mi).
The square of a planet's orbital period is proportional to the cube of the length of the semi-major axis of its orbit. The elliptical orbits of planets were indicated by calculations of the orbit of Mars. From this, Kepler inferred that other bodies in the Solar System, including those farther away from the Sun, also have elliptical orbits. The ...
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