What are the sizes of the nine planets?
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Q:

What are the sizes of the nine planets?

A:

Quick Answer

The nine planets in the solar system range in size from approximately 3,000 to 140,000 kilometers in diameter. Ranked from smallest to largest the planets are Pluto, Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn and Jupiter.

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Full Answer

The farthest planet from the sun is also the smallest. Pluto's diameter is approximately 3,000 kilometers. Little is known about this planet as it is the only one a space probe hasn't visited. Mercury is about 5,000 kilometers in diameter. It is the closest planet to the sun and is very hot because of the sun's close proximity. Mars is called the red planet because of the abundance of rusty iron on its surface. It is the third smallest planet with a diameter of approximately 7,000 kilometers. Venus is the closest planet to Earth in size with a diameter of 12,000 kilometers. Venus is unusual because it rotates in the opposite direction to the other planets. Earth has a diameter of 12,800 kilometers. It is the third planet from the sun and takes 365 days to complete an orbit. Neptune is one of the four gas giants in the solar system. This gaseous ball has a diameter of 50,000 kilometers. Another gas giant, Uranus is 52,000 kilometers wide. Its atmosphere is mostly hydrogen. Saturn is the second largest planet with a diameter of 120,000 kilometers. Second only to Jupiter in size, Saturn is known for its rings. Jupiter is the largest planet with a diameter of 140,000 kilometers. It is larger than 1,000 Earths combined.

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Related Questions

  • Q:

    What are the names of the nine planets in order?

    A:

    The names of the nine planets in order are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Many individuals use a mnemonic, or memory device, to remember these names. Pluto used to be considered a planet but is no longer classified as one.

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  • Q:

    Where can I find pictures of the nine planets?

    A:

    Various websites dedicated to the solar system have photos of the nine planets. Some of these websites are universetoday.com, nineplanets.org, space.com and popsci.com. Most of the photos online are credited to the National Aeronautics and Space Administration, commonly known as NASA.

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  • Q:

    What are the names of the nine planets in the solar system?

    A:

    The names of the nine planets in the solar system are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. However, astronomers have reclassified Pluto as a dwarf planet.

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  • Q:

    How often do the planets align?

    A:

    The nine planets in this solar system somewhat align once every 500 years and are grouped within 30 degrees every one to three alignments. When astrologers describe the planets as being aligned, they do not necessarily mean that all of the planets line up on a perfectly straight line. The last alignment within 30 degrees occurred in 561 B.C., and the next alignment within 30 degrees takes place in 2854.

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