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:

    What are the similarities between Earth and Neptune?

    A:

    Although they are quite dissimilar in almost every way, the Earth and Neptune do share some similar qualities such as gravity, color and orbit. With a gravitational pull that is only 14-percent stronger than the Earth's, Neptune and the Earth have similar gravitational pulls. Both planets are blue and both orbit around the Sun.

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  • Q:

    How many miles is Neptune from the sun?

    A:

    Due to its elliptical orbit, Neptune's distance from the Sun fluctuates between 2.77 and 2.82 billion miles. The eighth planet in the solar system, Neptune is also the furthest from the Sun.

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  • Q:

    How far from the sun does Neptune orbit?

    A:

    Neptune is the eighth planet from the sun, and it's about 2.8 billion miles away from the sun. This distance is roughly 30 times further away from the sun than Earth is, making Neptune a cold and dark planet.

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  • 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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