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Thread: Something I've always wondered (kind of a silly question)

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    Default Something I've always wondered (kind of a silly question)

    This may seem stupid, but I just had to ask. Why are planets round? Come to think of it, the moon, the sun and all of the stars are round too. Why?

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    Default Re: Something I've always wondered (kind of a silly question)

    They were built in circular motion with rocks, metals, gas, and others. I think.
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    Default Re: Something I've always wondered (kind of a silly question)

    Like Seven said. Something resembling gravity makes shit round. Like how you pour liquids out in space and they are liquids because they want to be in a big party ball and not seperate. Even liquids want to fuck.
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    Default Re: Something I've always wondered (kind of a silly question)

    gravity pulls everything to the center plus their rotation makes it round.

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    Default Re: Something I've always wondered (kind of a silly question)

    The earth like many of the planets is notexactly spherical, it more resembles an egg than a ball, bulging at the polls.
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    Default Re: Something I've always wondered (kind of a silly question)

    Planets seem to be spheres, not cubes or cylinders or oddball rocky shapes. Some smaller bodies such as asteroids or Mars moons Phobos and Deimos, do have odd shapes, but larger bodies like the nine planets and most of their moons do look like spheres. That's because of the nature of gravity. You can think of gravity as a force that points inward toward the center of the planet so that every part of the surface is pulled evenly toward the center, resulting in a spherical shape.

    Of course, planets are not perfect spheres because mountains and valleys and even skyscrapers are all deviations from the spherical shape. However, as planets get larger, gravity gets stronger, until eventually large objects on the surface are crushed under their own weight. That's why we don't have mountains that are 50 miles high or skyscrapers that are 2,000 stories tall. Planets stay basically spherical because any large deviations get crushed. Although gravity keeps planets close to spherical, there are other forces that cause deviations from the basic spherical shape. For example, the rotation of the earth once every 24 hours, causes an apparent centrifugal force which creates a bulge at the equator. In fact the earth's diameter at the equator is 7,926 miles while the diameter between the poles is only 7,900.

    The technical name for this process is "isostatic adjustment."
    With much smaller bodies, such as the 20-kilometer asteroids we have seen in recent spacecraft images, the gravitational pull is too weak to overcome the asteroid's mechanical strength. As a result, these bodies do not form spheres. Rather they maintain irregular, fragmentary shapes.

    ALSO - a sphere has the lowest surface area to volume ratio (if you drop a piece of molten metal into water, it cools into the shape of a sphere) Arguably, all the planets cores were formed from burning molten metal and therefore cooled into spheres in the freezing vacuum of space, before the gravitational pulll began to attract more debris and matter.
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    Default Re: Something I've always wondered (kind of a silly question)

    Quote Originally Posted by X View Post
    Planets seem to be spheres, not cubes or cylinders or oddball rocky shapes. Some smaller bodies such as asteroids or Mars moons Phobos and Deimos, do have odd shapes, but larger bodies like the nine planets and most of their moons do look like spheres. That's because of the nature of gravity. You can think of gravity as a force that points inward toward the center of the planet so that every part of the surface is pulled evenly toward the center, resulting in a spherical shape.

    Of course, planets are not perfect spheres because mountains and valleys and even skyscrapers are all deviations from the spherical shape. However, as planets get larger, gravity gets stronger, until eventually large objects on the surface are crushed under their own weight. That's why we don't have mountains that are 50 miles high or skyscrapers that are 2,000 stories tall. Planets stay basically spherical because any large deviations get crushed. Although gravity keeps planets close to spherical, there are other forces that cause deviations from the basic spherical shape. For example, the rotation of the earth once every 24 hours, causes an apparent centrifugal force which creates a bulge at the equator. In fact the earth's diameter at the equator is 7,926 miles while the diameter between the poles is only 7,900.

    The technical name for this process is "isostatic adjustment."
    With much smaller bodies, such as the 20-kilometer asteroids we have seen in recent spacecraft images, the gravitational pull is too weak to overcome the asteroid's mechanical strength. As a result, these bodies do not form spheres. Rather they maintain irregular, fragmentary shapes.

    ALSO - a sphere has the lowest surface area to volume ratio (if you drop a piece of molten metal into water, it cools into the shape of a sphere) Arguably, all the planets cores were formed from burning molten metal and therefore cooled into spheres in the freezing vacuum of space, before the gravitational pulll began to attract more debris and matter.
    Yep exactly that was just studying this before I came online, bloody exams.
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    Default Re: Something I've always wondered (kind of a silly question)

    Reps to all those who replied. Thanks for answering this. You can always learn something new, even in a hidden board in a boxing forum.

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    Default Re: Something I've always wondered (kind of a silly question)

    Yep to what X said

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    Default Re: Something I've always wondered (kind of a silly question)

    Quote Originally Posted by Master View Post
    Yep to what X said
    yesss master!

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