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Conservation of energy. E= -mu/r + mcV

Conservation of E gives :

0=(d/dr + Del)m(-u/r + cV) = m(v^2/r - cv/r cos(x)) + m(cdv/dr + cDelxV -Del u/r).

The real part is zero:

mv^2/r - mcv/r cos(x) =0 so mv^2/r = mcv/r cos(x0 gives v/c= cos(x) =z the redshift and equilibrium.

The vector part is also zero and gives the orbit:

0 =dcV/dr + vc/r sin(x) T' + vc/r cos(x) R'

T' and R' are the Transverse and Radial unit vectors.

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14y ago
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11y ago

The gravity of the Sun (combined with the inertia of the planets) causes the planets to orbit the Sun.

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12y ago

Gravity keeps planets in orbit around the Sun.

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Q: What keeps the planets in there orbits?
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What from the Sun keeps the planets in their orbits?

Gravity


What keeps planets in elliptical orbits?

Gravity and velocity (inertia) keeps planets in orbit around suns.


Who keeps the planets in their orbits?

It isn't actually a who, but a what. That what is Gravity.


How are planets kept in there orbits?

The gravitational pull of the sun keeps the planets in orbits... Although some people think it is magnetism....


What force keeps planets and moons going in orbits?

The force of gravity causes orbits.


What is the force that along with inertia keeps the planets in their orbits?

gravity


Why do the planets orbit the sun What is the shape of those orbits?

Planets orbit the sun because gravity keeps them from escaping, and momentum keeps them moving forward. The orbits are elliptical, which is like an oval.


How do planets stay on orbit?

The gravity of the Sun keeps the planets in their orbits. They stay in their orbits because there is no other force in the Solar System which can stop them.


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The force of the Sun's gravity keeps them in their orbits.


What are the 2 forces not keeps the planets in their respective orbits?

Centripetal force and Gravity


What force keeps the planets moving forward in their orbits?

The force you seek is gravity.


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The gravity that keeps the planets in orbit is the sun's gravity, which is a product of the sun's mass.