What causes the angle of a parallax to increase?

Answer 1

Imagine three space bodies A, B and C. The parallax angle at A, as observed from B and C, increases when the side BC is fixed and A moves closer to BC, and also, when A is fixed and BC widens.

Let A be a star, B and C be two telescopes at different locations. If A is closer to B, then the parallax angle at A as seen from B and C will be larger. If A is the same star, then the parallax at A will be larger if one of the telescopes, C, is drawn farther away from A.

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Answer 2

John Alexander

As the distance to the object decreases, the angle of parallax increases.

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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.