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Ghosts of the Night Sky

Almost all of the lights in the night sky are ghosts. The further you look into the cosmos, the further you look back in time. The closest star to our sun is 4.2 light years away. Meaning that the light coming from Alpha Centauri is 4.2 years old. Some of the stars you see at this present time in the night sky have probably already died thousands, millions or billions of years ago. However, the echoes of their existence in the form of their ancient light still arrive today on our doorstep. Even our Moon is no exception. It takes light 1.5 seconds to arrive at earth after being reflected by the moon's surface. Meaning the moon is 1.5 seconds old. Do you believe in ghosts? look at the night sky.

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