How big are stars and how far away from earth are they?
Stars are of different sizes.
The average size of our sun is 1.3 million times that of the earth. The star Betelgeuse has a radius 1000 times that of the sun. Proxima Century, one of the smallest stars, has a mass of only 12% that of the sun and a diameter of 200,000 kilometers. The distances between these stars vary as well; Proxima is 8.6 light years away from Betelgeuse, 600 light years away, and Ulas 0015+01, one of the Milky Way's furthest stars, is 900,000 light years away.
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Proxima Centauri is the closest star to Earth, apart from the Sun, at 4.24 light-years; other stars can be much farther away, with some being thousands or even millions of light-years. Stars vary greatly in size as well, ranging from relatively small stars called red dwarfs, which can be less than half the size of the Sun, to massive supergiants, which can be hundreds of times larger than the Sun.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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