Q:

# What size is the sun?

A:

The sun has a radius of about 432,450 miles and a diameter of about 864,938 miles and is the largest object in the solar system. The sun's circumference measures approximately 2.7 million miles.

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The sun is also the most massive object in the solar system. It contains 99.8 percent of the solar system's total mass and is about 333,000 times the mass of the Earth. With a volume of 1.4 x 1027 cubic meters, about 1.3 million Earths could fit inside the sun. However, compared to other stars, the sun is just average in size. There are stars that are 700 times bigger than the sun.

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## Related Questions

• A:

Earth's solar system has only one sun, but if the word "sun" is taken to mean "any star with planets in orbit," the Milky Way might have as many as 400 billion suns. If the observed ratio of approximately one planet per star is consistent everywhere, the observable universe might contain 10^24, or 1 septillion, suns.

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• A:

The sun's mass is estimated to be 1.989 times 10E30 kilograms, about the equivalent of 333,000 Earths, and has a diameter of about 864,938 miles. About 99.8 percent of the entire mass of the solar system is contained within the sun.

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• A:

The diameter of the sun is approximately 864,938 miles, though there is a slight difference between its polar and equatorial diameters. As the sun is nearly in the shape of a perfect sphere, this diameter difference is only about 6.2 miles.