how many times bigger is the largest star than our sun?
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The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
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The Short Answer: Our Sun is 864,000 miles in diameter and 10,000 degrees Fahrenheit on the surface. Our Sun is a bright, hot ball of hydrogen and helium at the center of our solar system. It is 864,000 miles (1,392,000 km) in diameter, which makes it 109 times wider than Earth.
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Bottom line: The sun's diameter is about 400 times larger than that of the moon – and the sun is also about 400 times farther from Earth. So the sun and moon appear nearly the same size as seen from Earth.
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The diameter of Venus is 12,103 km, while the diameter of the Sun is 1.4 million km. In other words, the Sun is 115 times larger than Venus. You could fit about 1.5 million planets the size of Venus inside the Sun.
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The Short Answer: Our Sun is a bright, hot ball of hydrogen and helium at the center of our solar system. It is 864,000 miles (1,392,000 km) in diameter, which makes it 109 times wider than Earth.
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A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III.
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The sun has a mass of 1.9891x1030 kg = 4.384x1030 lb = 2.192x1027 tons, or a mass 333,000 times that of the Earth. The radius of the Sun is 696,265,000 meters = 696,265 km = 432,639 mi or a radius 109 times that of the Earth. The volume of the Sun is so huge that it could hold over 1 million Earths.
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Circumference of the Sun Just for comparison, the equatorial circumference of the Earth is 40,075 km. So, the circumference of the Sun is 109 times larger than the circumference of the Earth.
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Jupiter, the largest planet in the solar system, has a diameter of about 87,000 miles. (And even Jupiter is tiny compared to the Sun, which is roughly ten times wider than Jupiter, at about 864,000 miles.)
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The Short Answer: Our Sun is an average sized star: there are smaller stars and larger stars, even up to 100 times larger. Many other solar systems have multiple suns, while ours just has one.
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The mean radius of the sun is 432,450 miles (696,000 kilometers), which makes its diameter about 864,938 miles (1.392 million km). You could line up 109 Earths across the face of the sun. The sun's circumference is about 2,713,406 miles (4,366,813 km).
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Stars make their own light, just like our sun (the sun is a star — the closest star to Earth). But the stars are very, very far away from our solar system so they appear to be very tiny to us, even though up close they are large.
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The entire Earth is about 7,900 miles across. Jupiter, the largest planet in the solar system, has a diameter of about 87,000 miles. (And even Jupiter is tiny compared to the Sun, which is roughly ten times wider than Jupiter, at about 864,000 miles.)
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So we have to look at one of the most massive of all supermassive black holes. It has a diameter of about 78 billion miles. For perspective, that's about 40% the size of our solar system, according to some estimates. And it's estimated to be about 21 billion times the mass of our sun.
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Until relatively recently, it was thought that our neighboring galaxy, Andromeda, was far larger than the Milky Way. But the Milky Way is, in fact, considerably larger than Andromeda.
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GreaterSkies custom star maps remain unmatched for accuracy and level of detail. Unlike some other star charts that only show major stars, our maps show 7,000 to 8,000 stars, the constellations and the Solar System planets. At any time of day or night, for past or future dates, anywhere on earth.
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It is all thanks to a striking coincidence. The sun is about 400 times as wide as the moon, but it is also 400 times further away. The two therefore look the same size in the sky – a unique situation among our solar system's eight planets and 166 known moons.