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# How do planets change orbital speed change?

# 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.

# At what speed does each planet orbit the Sun?

Mercury - 47.8725 km/sec = 107,000MPH Venus - 35.0214 km/sec = 78,350 MPH Earth - 29.7859 km/sec = 66,630 MPH Mars - 24.1309 km/sec = 54,000 MPH Jupiter - 13.0697 km/s…ec =29,240 MPH Saturn - 9.6724 km/sec = 21,640 MPH Uranus - 6.8352 km/sec = 15,290 MPH Neptune - 5.4778 km/sec = 12,250 MPH Pluto (TNO, or dwarf planet) = 10,700 MPH

# What is the planet with the slowest orbital speed?

The farther a planet is away from the sun, the slower its orbital speed. So, the farthest planet, Neptune, has the slowest orbital speed.

# 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.

# How does a planets distance from the sun affect the planets orbit speed?

the closer you are to the sun it affects the planets speed cause of the suns gravitational pull

# 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.

# Which planet has the fastest orbital speed?

Any object rotating around a fixed central point will always have a greater rotation speed the closer it is to center. Therefore Mercury, with an orbital speed of 47.9 km/s… is the fastest. Here are all the planets in order Planetary Mean Orbital Speeds in Km/s Mercury - 47.9 Venus - 35.0 Earth - 29.8 Mars - 24.1 Jupiter - 13.1 Saturn - 9.6 Uranus - 6.8 Neptune - 5.4

# 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.

# Why do planets differ in their orbital speed?

Because according to Kepler's laws the orbital speed of a planet is proportional to the square root of the reciprocal of the distance: v = d-Â˝.

# Which planet has the greatest variation of orbital speed?

Mercury, because it has the largest eccentricity - 0.2

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# 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.

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In Science

# What is a speed that does not change?

the speed of light does not change

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In Science

# What is change in speed?

Change in speed (more precisely change in velocity) is called acceleration.

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In Cosmology

# How are the speeds and orbit times of the planets affected by it?

As it increases, the orbital speed increases, and the period (time to complete an orbit) decreases, which is why Mercury has the shortest year, and Neptune the slowest orb…ital speed.

Updated Answer

# What is the orbital speed for each planet?

The average orbital speed of a planet or other object in orbit round the Sun is propotional to the reciprocal of the square root of the average distance from the Sun. … V is proportional to 1/ sqrt (D) This can be derived from Kepler's laws of planetary motion, published in 1609 and still in use.