why do stars appear to slightly shift their position in night sky
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due to refraction of light which is emmited by stars
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Explanation:
Light from a star is refracted (bent) as it leaves space (a vacuum) and enters the earth's atmosphere. ... So, as the light from a star comes down, the dense air bends the light more. Due to this refraction of star's light, the star appears to be at a higher position.
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