# How does the time for a planet to orbit the sun change with its distance from the sun?

The further away from the sun, the longer it takes to make a revolution around the sun. When you take the average distance of a planet from the sun (average of aphelion and …perihelion) and plot it onÂ Cartesian coordinates, you will notice that there is a distinct relationship. Â Units are in US customaryThe line is not linear but rather a power. Â Trend line: y = 66654(x^-0.5) or y = 66654/sqrt(x). Â Plot average orbital velocity in the Y axis MPH and average distance in the x axis in AU. At a distance of approx 1 mile from the surface from the sun the orbital period is about 15 seconds and a velocity of the speed of light!

# If the speed of a satellite orbiting earth began to decrease how would its orbit change?

If the speed of a satelite orbiting earth were to decrease, it's orbit would come closer to the earth, and eventually it would fall to the Earth. Space administratioins(…like NASA) use calculus and whatever fancy term thay use for their math to try and make it land in a safe place. On the other hand, if it were to increase in speed, it would eventually leave Earth's orbit.

# Can a planet ever change it's way in orbit?

This is very unlikely. However, some planets, like Venus and Uranus ROTATE "backwards" (they do not spin the same way as the other planets). Some scientists think …that Venus rotates backwards because a large meteor may have slammed onto it's surface so hard, it changed Venus's rotation. About one third of the moons in our galaxy rotate backwards, as well.

# How does the time for planet to orbit the sun change with its distance from the sun?

I'm not sure if you want a more detailed answer than this, but the farther away a planet is from the sun, the longer it takes to complete its orbit, since a complete orbit tra…verses far longer distances when a planet is far from the sun. Although planetary orbits are actually elliptical, thinking of them as circles will simplify the principle involved: if the distance from the earth to the sun is a distance of one, and the distance from Jupiter to the sun is five, the "circular" orbit for the earth would be 2(pi)one = about 6.3 units, while the distance for the earth would be 2(pi)five = about 32 units.

# If the moon orbits the earth at a constant speed why is it always changing?

Its speed is not always constant; because of its orbit, it sometimes goes faster or slower. However, its appearance changes because of where it is compared to the earth and su…n - when the sun shines on part of it, that part is visible, but where it is in shadow, it is not visible.

# Speed of planets rotation and orbitation?

Iit takes planet Earth 23 hours and 56 minutes to rotate omits axis once

# Why does a planet in an elliptical orbit change speed?

because it moves slowly

# The changing speed of a comet as it orbits the sun?

The orbit of most comets is significantly elliptical. It seems that as the comet nears the sun, the attraction between the two bodies greatly increases, and therefore, accel…eration occurs such that the speed of the comet's approach to the sun greatly increases. Nevertheless, being quite small, it quickly rounds the sun while at close distance and is flung like the recoiling of an elastic band back out into space (possibly assisted by some other external attraction in space). It would seem that, nevertheless, the attraction of gravity between the sun and comet causes the inertial departure to eventually slow down: 'escape inertia' is overcome, and the body commences on its acceleratory path back towards the sun again.

# How does comet Halley's orbital speed change as it orbits the sun?

as it gets closer to the sun, the gravitational forces that act on it increase and it speeds up. at the other end of its orbit, its far away, so it slows

# Why does the speed of a satellite undergo change in an elliptical orbit?

Variance from mean distance denotes an acceleration as kinetic and potential energies are interchanged.

# Is the changing speed of earth in its orbit cyclical?

Yes. Once a year, at periapsis (when Earth is closest to the Sun, in January), the Earth moves faster; six months later, at apoapsis, it moves slower.

# Why does the speed of a satellite undergo change in elliptical orbit?

Because that's the way gravity works. If you take Newton's simple formula for the mutual gravitational force between any two objects, and if you have enough calculus and …geometry to be able to do it, you can massage it around and show that closed orbits must be ellipses, and that the orbital speed must be greatest when the separation is smallest.

Answered

In Science

# Why when a planet is orbiting the sun is it acceleration but the speed does not change?

Because acceleration in physics, is the rate of change of velocity over time. In one dimension, acceleration is the rate at which something speeds up or slows down. The planet…s are constantly changing direction because of their orbit.

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In Astronomy

# Is the average speed of earths orbit changing?

It can be expected to change gradually over time, but the difference from one year to the next, or even in thousands of years, will be insignificant.

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In Science

# Why does the force of gravity change the speed of a satellite in an elliptical orbit?

In an elliptical orbit, the satellite will be closer to the planet (or to whatever it is orbiting) at some parts of its orbit than at other parts, since an ellipse is like a f…lattened circle, with a short axis and a longer axis. When the satellite is closer to the planet, the force of gravity (in accordance with Newton's law) will be greater. And when the force of gravity is greater, the orbit speeds up. Where the force of gravity is weaker, the orbit will slow down.

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In Comets

# Does a comet's speed change as it orbits the sun?

Yes. Comets have highly elliptical orbits. They move fastest when they are nearest the sun and slowest when they are farthest away.

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In Comets

# Does a comets speed change as it orbits the sun?

The comets speed does change when it orbits the sun, the reason is because as the comet gets closer to the Sun, the Sun's gravity pulls the comet towards it making the com…et speed up.