The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
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The sun is 330,330 times larger than the earth!
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The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
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The moon is actually moving away from Earth at a rate of 1.5 inches per year.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
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