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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-½.

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What planets orbital speed is about 30 kilometers per second?

earth orbital speed is 30 kilometers per second!!


This planets orbital speed is about 30 kilometers per second?

there is no answer people sorry!!


Which planets have fastest orbital speed in our solar system?

The ones closest to the Sun.


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No, planets do not revolve around the sun at the same speed. Their orbital speeds depend on their distance from the sun - planets closer to the sun have shorter orbital periods and faster speeds, while those further away have longer orbital periods and slower speeds.


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It varies: The planets closer to the Sun move faster (Kepler's Third Law). Mercury is fastest; according to Wikipedia, its average orbital speed is 47.87 km/s. Multiply that by 0.6 to get the approximate speed in miles per second.


How does the Earth probably compare in orbital speed to the other planets?

The Earth's orbital speed is relatively high compared to the other planets in our solar system due to its closer proximity to the Sun. Mercury has the fastest orbital speed, followed by Venus and Earth. The gas and ice giants like Jupiter, Saturn, Uranus, and Neptune have much slower orbital speeds due to their larger orbits and distances from the Sun.


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 orbital speed.


Which planet moves the most slowly in its orbit?

Of the major planets, Neptune. The speed of planets in their orbits is directly related to their distance from the sun. The farther a planet is from the Sun, the slower its orbital speed.


The orbital speed of Venus' and Neptune?

According to http://solarsystem.nasa.gov/planets/, Venus has an orbital velocity of 78,341 mph, and Neptune's is 12,253 mph...


Which planets have an orbital speed of less than 18 km per second?

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What keeps the planets from being pulled to the sun surface by gravity?

The orbital speed of the planets prevent this. The planet's ARE all failing towards the Sun but their horizontal speed means they always miss.