How does parallax relate to astronomy?

Answer 1

It is a method used to find the distance to nearby stars.

Radius of Earths orbit 150
million kilometers is taken as base for a triangle and the angle measured,By trigonometry the distance can be calculated.

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Answer 2

Alexander Acosta

In astronomy, parallax is used to measure the distances to nearby stars by observing their apparent shift against more distant background stars as the Earth orbits the Sun. This technique, known as stellar parallax, enables astronomers to determine the distances to stars within a certain range. Parallax is the apparent shift in position of an object when viewed from different angles.

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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.