When can you start noticing the effects of proper motion on constellations?

Answer 1

The milky way galaxy where most of the stellar constellations are part rotate but considering their size, it will take thousands of years to see small changes in constellation pattern.

View alterations in Ursa major after 10,000 years. Image courtesy of Virginia Education.

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Answer 2

Clara Avalos

You can start noticing the effects of proper motion on constellations over the course of centuries, as stars gradually change their positions relative to each other in the sky.

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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.