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  2. Extraterrestrial vortex - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_vortex

    The storm had some of the highest recorded wind speeds in the Solar System at approximately 2,400 km/h (1,500 mph) and rotated around the planet once every 18.3 hours. [36] When the Hubble Space Telescope turned its gaze to Neptune in 1994, the spot had vanished; but the storm causing the spot might have continued lower in the atmosphere. [37]

  3. Earth's rotation - Wikipedia

    en.wikipedia.org/wiki/Earth's_rotation

    Earth's rotation imaged by Deep Space Climate Observatory, showing tilt. Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Earth rotates eastward, in prograde motion.

  4. 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.

  5. Tests of general relativity - Wikipedia

    en.wikipedia.org/wiki/Tests_of_general_relativity

    However, a number of effects in the Solar System cause the perihelia of planets to precess (rotate) around the Sun in the plane of their orbits, or equivalently, cause the major axis to rotate about the center of mass, hence changing its orientation in space. [6] The principal cause is the presence of other planets which perturb one another's ...

  6. Gravity assist - Wikipedia

    en.wikipedia.org/wiki/Gravity_assist

    A gravity assist, gravity assist maneuver, swing-by, or generally a gravitational slingshot in orbital mechanics, is a type of spaceflight flyby which makes use of the relative movement (e.g. orbit around the Sun) and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft, typically to save propellant and reduce expense.

  7. Games on AOL.com: Free online games, chat with others in real ...

    www.aol.com/games/play/masque-publishing/astralume

    Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  8. Controversial proposal could move some Air National Guard ...

    www.aol.com/news/controversial-proposal-could...

    FILE - A solider wears a U.S. Space Force uniform during a ceremony for U.S. Air Force airmen transitioning to U.S. Space Force guardian designations at Travis Air Force Base, Calif., Feb. 12, 2021.

  9. Rotation period (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Rotation_period_(astronomy)

    In astronomy, the rotation period or spin period [1] of a celestial object (e.g., star, planet, moon, asteroid) has two definitions. The first one corresponds to the sidereal rotation period (or sidereal day ), i.e., the time that the object takes to complete a full rotation around its axis relative to the background stars ( inertial space ).