Q:

How old is the moon?

A:

Quick Answer

The scientific consensus is that the Earth's moon formed four and half billion years ago. About 100 million years after the formation of the solar system, another small planet is likely to have collided with the Earth, resulting in the formation of the Moon.

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How old is the moon?
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Full Answer

The solar system was formed when a giant cloud of dust and gas condensed to create the Sun. The planets were formed from leftover material that began to orbit the sun. Shortly after the formation of the solar system, a collision between Earth and a planet approximately the size of Mars created the Moon, which remained in Earth's orbit as its only satellite and which affects several natural processes including the Earth's tidal pattern.

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Related Questions

  • Q:

    What is the moon made of?

    A:

    The lunar crust is made of 43 percent oxygen, 20 percent silicon, 19 percent magnesium, 10 percent iron, 3 percent calcium and 3 percent aluminum. The moon's core is thought to consist of iron, sulfur and nickel, with the largest middle layer, or mantle, composed of olivine, clinopyroxene and orthopyroxene.

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  • Q:

    Where does the moon rise?

    A:

    The moon rises in the eastern sky and sets in the western sky because of Earth's rotation. Its rising and setting positions vary throughout the year from northeast/northwest to due east/west to southeast/southwest.

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  • Q:

    What is the weight of the moon?

    A:

    The moon has a mass of 7.35 x 10²² kilograms. It is only about 60 percent as dense as Earth, and as such, the moon's mass is only 1.2 percent of Earth's. Thus, it would take the mass of 81 moons to equal the mass of Earth.

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  • Q:

    Is the moon moving farther away from Earth?

    A:

    The moon is in fact gradually drifting away from the earth. Each year, the moon spins almost 4 centimeters farther from the earth, which makes the earth's day just a bit longer. While this 1.48-inch movement will eventually add up to a big change, it will take billions of years to make a significant difference to life on earth.

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