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Planetary nebula luminosity function

space Maturity 11-13

Stars can leave glowing clouds behind. We look at these clouds in space. They help us see how far away galaxies are. This helps us learn about our big world. It is like a map for space. Can you look at the stars?

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Tip of the red-giant branch
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📚 Content adapted from Wikipedia | Readability: FK 12.3 | Vital Level 5