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  2. Retrograde and prograde motion - Wikipedia

    en.wikipedia.org/wiki/Retrograde_and_prograde_motion

    All eight planets in the Solar System orbit the Sun in the direction of the Sun's rotation, which is counterclockwise when viewed from above the Sun's north pole. Six of the planets also rotate about their axis in this same direction. The exceptions – the planets with retrograde rotation – are Venus and Uranus.

  3. Apparent retrograde motion - Wikipedia

    en.wikipedia.org/wiki/Apparent_retrograde_motion

    In this context, the term refers to planets, as they appear from Earth, stopping briefly and reversing direction at certain times, though in reality, of course, we now understand that they perpetually orbit in the same uniform direction. [2] Although planets can sometimes be mistaken for stars as one observes the night sky, the planets actually ...

  4. Kepler's laws of planetary motion - Wikipedia

    en.wikipedia.org/wiki/Kepler's_laws_of_planetary...

    Despite being correct in saying that the planets revolved around the Sun, Copernicus was incorrect in defining their orbits. Introducing physical explanations for movement in space beyond just geometry, Kepler correctly defined the orbit of planets as follows: [1] [2] [5]: 53–54 The planetary orbit is not a circle with epicycles, but an ellipse.

  5. A Complete Guide to Every Mercury Retrograde Happening in 2024

    www.aol.com/complete-guide-every-mercury...

    During a retrograde, other planets move through space more quickly than Earth and will pass Earth in orbit around the sun. All of the planets in the solar system move in the same direction, but ...

  6. Orbital inclination - Wikipedia

    en.wikipedia.org/wiki/Orbital_inclination

    It is expressed as the angle between a reference plane and the orbital plane or axis of direction of the orbiting object. For a satellite orbiting the Earth directly above the Equator, the plane of the satellite's orbit is the same as the Earth's equatorial plane, and the satellite's orbital inclination is 0°. The general case for a circular ...

  7. Apsidal precession - Wikipedia

    en.wikipedia.org/wiki/Apsidal_precession

    Apsidal precession is considered positive when the orbit's axis rotates in the same direction as the orbital motion. An apsidal period is the time interval required for an orbit to precess through 360°, [2] which takes the Earth about 112,000 years and the Moon about 8.85 years. [3]

  8. List of orbits - Wikipedia

    en.wikipedia.org/wiki/List_of_orbits

    Sun-synchronous orbit: An orbit which combines altitude and inclination in such a way that the satellite passes over any given point of the planets's surface at the same local solar time. Such an orbit can place a satellite in constant sunlight and is useful for imaging, spy, and weather satellites.

  9. Astronomers Find New Mysterious Moons in Our Solar System ...

    www.aol.com/astronomers-mysterious-moons-solar...

    Of all the large moons in the solar system, it’s also the only one to orbit in the opposite direction of its planet—a likely remnant of its capture. Dense Triton is rockier than the other ...