Q:

How big is Neptune compared with Earth?

A:

Quick Answer

Neptune has an average diameter of 30,598 miles, which is approximately almost four times Earth's diameter. In terms of mass, Neptune weighs approximately 102 trillion trillion kilograms, making it 17 times heavier than Earth.

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Full Answer

Neptune has a surface area of approximately 2.9 billion square miles, which is nearly 15 times larger than Earth's surface area. Neptune was discovered on Sept. 23, 1846, after Johann Gottfried Galle observed it at the Berlin Observatory following orbit predictions made by French mathematician Urbain Joseph Le Verrier. A single orbit around the sun takes Neptune approximately 164.79 Earth years at an average velocity of 12,158 miles per hour.

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Related Questions

  • Q:

    How big is Neptune?

    A:

    Space.com indicates that Neptune's diameter of 15,299 miles is fourth longest among the planets. At 102 trillion trillion kilograms, Neptune has the third-highest mass of the eight planets in the solar system. However, it was one of the last planets discovered because it is the farthest from the sun.

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  • Q:

    How hot is the Earth?

    A:

    The hottest place on Earth is in its molten core, where temperatures reach approximately 10,800 degrees Fahrenheit. The surface temperatures on the planet vary widely, but according to NASA, the average surface temperature of the Earth is about 59 degrees Fahrenheit.

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  • Q:

    How heavy is the earth?

    A:

    The Earth has a mass of 5.97 times 10^24 kilograms. Because weight is defined as the gravitational force exerted on one body by another, the Earth cannot be heavy.

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  • Q:

    Why is Earth important?

    A:

    As the only known planet that is habitable for human beings, the Earth’s importance is self-evident. Every living organism known to science obtains all of its resources from Earth, and has very few other options available. Without the Earth, humans would be doomed to extinction, unless they were able to adapt to another planet's conditions before the Earth disappeared.

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