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Stars
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We can see but not hear stars in faraway galaxies. This is because light can travel through a vacuum but sound cannot (sound needs a medium).
Rights: Shingo Takei
Published: 10 May 2011Updated: 12 March 2019Size: 159.32 KBWe can see but not hear stars in faraway galaxies. This is because light can travel through a vacuum but sound cannot (sound needs a medium).