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How do you calculate the distance between stars and the earth?

Answer 1

Leah Abbate

For near by stars a method called parallax is used.

For far away stars Cepheid variables are used as standard candles and distance calculated

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Answer 2

Levi Alexander

There are several ways to calculate the distance between stars and Earth: trigonometric parallax, spectroscopic parallax, and standard candles like cepheid variables and supernovae. Trigonometric parallax measures the apparent shift in a star's position as observed from Earth at different times of the year. Spectroscopic parallax uses the star's spectrum to determine its luminosity and distance. Standard candles like cepheid variables and supernovae are a useful tool for measuring stars' distances from Earth.

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Answer from HIX Tutor

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.