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Why are some constellations noticeable in movement?

Updated: 8/17/2019
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Kattyred

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14y ago

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Because the Earth travels around the Sun by about a degree per day, the apparent positions of the stars in the night sky appear to move as well. From the surface of the Earth, we generally cannot see the stars that are on the other side of the Sun from us; they would be lost in the glare of the Sun itself.

So each night brings a slight apparent movement of the stars. The stars themselves are all moving, but they are so far away that we cannot notice their motion over such a short period as a human lifetime.

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Q: Why are some constellations noticeable in movement?
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