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👉The universe is unbelievably vast. Even though it began about 13.8 billion years ago, light from many stars and galaxies still hasn’t reached Earth. That’s because light, while incredibly fast, does not travel instantly. It moves at about 300,000 kilometers per second. This means the most distant objects we can see today are those whose light started its journey billions of years ago, not long after the universe was born. What we can observe forms what scientists call the “observable universe.
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