Q:

How big is Neptune compared with Earth?

A:

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.

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 cold is Neptune?

    A:

    The average temperature on Neptune is -373 degrees Fahrenheit. Neptune is, on average, 2.8 billion miles from the sun, making it the eighth planet from the sun, which is one reason this planet is so cold.

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  • Q:

    How fast does Neptune spin?

    A:

    Neptune takes 19 hours to complete its spin. It takes 165 Earth years to make one orbit around the sun, which equates to one year on Neptune. Neptune is the eighth planet in the solar system, and it is at an average distance of 2.8 billion miles from the sun.

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  • Q:

    How much would you weigh on Neptune?

    A:

    A person who weighs 100 pounds on Earth would weigh 112 pounds on Neptune. This is because Neptune’s surface gravity is 1.12 times greater than the Earth’s gravity. Neptune is one of the four gas giants in the solar system.

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  • Q:

    What is Neptune known for?

    A:

    Neptune is a giant planet comprised largely of helium and hydrogen gases. It is the furthest of the eight planets from the sun, and it takes about 165 Earth years for Neptune to complete a full orbit. Neptune is also known for its six rings and 14 moons.

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