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  2. Sphere of influence (astrodynamics) - Wikipedia

    en.wikipedia.org/wiki/Sphere_of_influence_(astro...

    A sphere of influence (SOI) in astrodynamics and astronomy is the oblate spheroid-shaped region where a particular celestial body exerts the main gravitational influence on an orbiting object. This is usually used to describe the areas in the Solar System where planets dominate the orbits of surrounding objects such as moons , despite the ...

  3. Sphere of influence (black hole) - Wikipedia

    en.wikipedia.org/wiki/Sphere_of_influence_(black...

    The sphere of influence is a region around a supermassive black hole in which the gravitational potential of the black hole dominates the gravitational potential of the host galaxy. The radius of the sphere of influence is called the "(gravitational) influence radius". There are two definitions in common use for the radius of the sphere of ...

  4. Stellar dynamics - Wikipedia

    en.wikipedia.org/wiki/Stellar_dynamics

    This so-called sphere of influence is loosely defined by, up to a Q-like fudge factor ⁡, ⁡ / (+) /, hence for a Sun-like star we have, = (+) ⁡ / > [,] = (), i.e., stars will neither be tidally disrupted nor physically hit/swallowed in a typical encounter with the black hole thanks to the high surface escape speed = / = / from any solar ...

  5. Hill sphere - Wikipedia

    en.wikipedia.org/wiki/Hill_sphere

    The Hill sphere is a common model for the calculation of a gravitational sphere of influence. It is the most commonly used model to calculate the spatial extent of gravitational influence of an astronomical body ( m ) in which it dominates over the gravitational influence of other bodies, particularly a primary ( M ). [ 1 ]

  6. Heliosphere - Wikipedia

    en.wikipedia.org/wiki/Heliosphere

    The heliosphere is the area under the influence of the Sun; the two major components to determining its edge are the heliospheric magnetic field and the solar wind from the Sun. Three major sections from the beginning of the heliosphere to its edge are the termination shock, the heliosheath, and the heliopause.

  7. Celestial mechanics - Wikipedia

    en.wikipedia.org/wiki/Celestial_mechanics

    Astrometry is a part of astronomy that deals with measuring the positions of stars and other celestial bodies, their distances and movements. Astrophysics; Celestial navigation is a position fixing technique that was the first system devised to help sailors locate themselves on a featureless ocean.

  8. Creepy eyeball projected onto The Sphere in Las Vegas ... - AOL

    www.aol.com/creepy-eyeball-projected-onto-sphere...

    The Madison Square Garden (MSG) Sphere at the Venetian Resort in Las Vegas has LED lights that can create these large-scale projections. It has been filmed projecting the image of a gigantic ...

  9. Orbital mechanics - Wikipedia

    en.wikipedia.org/wiki/Orbital_mechanics

    The size of the "neighborhoods" (or spheres of influence) vary with radius : r S O I = a p ( m p m s ) 2 / 5 {\displaystyle r_{SOI}=a_{p}\left({\frac {m_{p}}{m_{s}}}\right)^{2/5}} where a p {\displaystyle a_{p}} is the semimajor axis of the planet's orbit relative to the Sun ; m p {\displaystyle m_{p}} and m s {\displaystyle m_{s}} are the ...