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The next-closest star after the Sun is trillions of kilometres away.

The next-closest star after the Sun is trillions of kilometres away.

Even light, the fastest thing there is, takes years to reach us from it. That is why the other stars look so tiny at night.

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The Sun is so big that about 1.3 million Earths could fit inside it. The Sun is so big that about 1.3 million Earths could fit inside it. The Sun is a giant ball of hot, glowing gas. The Sun is a giant ball of hot, glowing gas. The Moon has no light of its own — it reflects the Sun. The Moon has no light of its own — it reflects the Sun. Stars twinkle because their light wobbles through our air. Stars twinkle because their light wobbles through our air. The Moon's shape seems to change a little each night. The Moon's shape seems to change a little each night.