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Stars closer to the horizon appear to twinkle more than stars that are overhead - this is because the light of stars near the horizon has to travel through more air than the light of stars overhead and so is subject to more refraction.
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www.enchantedlearning.com/subjects/astronomy/stars/twin...
www.enchantedlearning.com/subjects/astronomy/stars/twinkle.shtml
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You will notice that stars closer to the horizon will appear to twinkle more than other stars. This is because there is a lot more atmosphere between you and a star near the horizon than between you and a star higher in the sky.
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starchild.gsfc.nasa.gov/docs/StarChild/questions/questi...
starchild.gsfc.nasa.gov/docs/StarChild/questions/question26.html
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Stars twinkle because of turbulence in the atmosphere of the Earth. As the atmosphere churns, the light from the star is refracted in different directions. ... Planets do not twinkle the way stars do. In fact, this is a good way of figuring out if a particular object you see in the sky is a planet or a star.
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curious.astro.cornell.edu/question.php?number=114
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Why do stars twinkle? I have heard that it is because the light is refracted as it passes through the atmosphere, but if that is true, why does light from planets not twinkle? ... So why don't planets twinkle? This is because, even though they may look point-like to naked eyes, they are actually much bigger than the...
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imagine.gsfc.nasa.gov/docs/ask_astro/answers/981217a.ht...
imagine.gsfc.nasa.gov/docs/ask_astro/answers/981217a.html
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Are you sure you want to quit? ... Unit A: Life Science...
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www.eduplace.com/kids/hmsc/activities/simulations/gr5/u...
www.eduplace.com/kids/hmsc/activities/simulations/gr5/unitd.html
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Discover what twinkling stars can tell us with BBC Space. ... Twinkle twinkle little star; There aren't many nursery rhymes about astronomy. But 'twinkle twinkle little star' makes a useful point. We can tell which lights in the night sky are stars because they appear to twinkle.
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www.bbc.co.uk/science/space/stars/twinkle/index.shtml
www.bbc.co.uk/science/space/stars/twinkle/index.shtml
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Because of this "chromatic abberation," stars can appear to change colors when they are twinkling strongly. Stars twinkle because of turbulence in the atmosphere of the Earth. As the atmosphere churns, the light from the star is refracted in different directions.
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www.ufowisconsin.com/skywatch/2003_xxxx_twinkletwinkle....
www.ufowisconsin.com/skywatch/2003_xxxx_twinkletwinkle.html
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Because the atmosphere is always windy and changing, the number and position of images is always changing, with the result that stars appear to twinkle. In reality, the above time-lapse sequence occurs ten times faster.
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antwrp.gsfc.nasa.gov/apod/ap000725.html
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Stars do not really twinkle, they just appear to twinkle when seen from the surface of Earth. The stars twinkle in the night sky because of the effects of our atmosphere. When starlight enters our atmosphere it is affected by winds in the atmosphere and by areas with different temperatures and densities.
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coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/stars_t...
coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/stars_twinkle.shtml
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