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The Moon's shape seems to change a little each night.

The Moon's shape seems to change a little each night.

Sometimes it looks round and full, and sometimes like a thin curve. These changing shapes are called the phases of the Moon.

🌙 All Sun Moon Stars facts →

More facts about Sun Moon Stars

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 Sun is really a star, just very close to us. The Sun is really a star, just very close to us.