How does gravitational pull affect a solar system object’s motion?

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  • 3 weeks ago

    The Most Massive object in our own Solar System is the Sun

    We can use it basically as the Datum for the Radii of the orbits of all the Planets and everything Else

     Their orbits are basically circular but with the combined Masses of the rest of the Planets they all have slight eccentricities in their Orbits

    Jupiter being the Biggest Disruptor effects most of the rest

    Even our Moon causes Earth to slightly weave

  • 3 weeks ago

    Gravity is an inverse square field. In such a field there are only two possible trajectories for a free, unpropelled object. The object can only follow an ellipse or a hyperbola.

    However within the solar system, no object is truly free from perturbations from all the other large objects in the solar system. This is why objects such as comets, meteorites and asteroids eventually end up on collision courses with planets or end up getting ejected clear out of the solar system.

    Even planets are subject to perturbations due to other planets, and thus the solar system is only stable to a degree. Given enough time the solar system would become more chaotic.

  • 3 weeks ago

    A star is usually the center of mass and gravity. Where larger planets have formed, their movement stabilizes in an orbit. Smaller objects drawn into a solar system cause a more elliptical orbit. (Kepler orbit) These are minor planets,asteroids, comets, and smaller space objects. The greater differences in mass, they accelerate as they move to perigee, then slow moving to apogee.

    All of these have their own mass and different orbital periods that effect each other.

    IE: a comet may slightly change its orbital path as it pass into the inner region of a solar system. Positions of planets at this time have different results with each orbit of a comet. Quite a bit of math explains all this, even the Coriolis effect.

    A large part of celestial dynamics. A good read:

    https://en.wikipedia.org/wiki/Elliptic_orbit

  • 3 weeks ago

    The mass and gravity  of stars is why planets, dwarf planets, asteroids (minor planets), boulders to dist grains, ice, and comets orbit stars and moons orbit planets. If the stat disappears, all the objects take off on straight line trajectories tangent to their orbits. This ignores the fact  that there are no straight lines in a curved space time continuum. The center of mass Ina planetary system MOVES because the planets ate moving. The center of mass is often NOT IN the star. 

    https://commons.m.wikimedia.org/wiki/File:Solar_sy...   

    https://en.m.wikipedia.org/wiki/Barycenter#   

    Planets and dust and ice are constantly falling toward a star  but they usually have enough speed, velocity and momentum to stay in orbit and not fall into the star. Comets HAVE fallen into the Sun. A few have gone through the Sun to break up later. 

    Rogue planets that have no star do exist. That may be where all that missing dark matter may be. 

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  • 3 weeks ago

    Well... the gravitational pull from the star on planets, asteroids, and comets causes their path to curve into ellipses around the star. The objects are constantly being accelerated - only, instead of gaining speed, the acceleration causes the object to change direction, continually - curving the path around the star.

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