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Surface brightness

space Maturity 9-11

Some things in space look bright.

Luminance vs angular size.svg
Luminance vs angular size.svg
A big cloud can look dim. A small star looks very bright. This helps us see far away things. It is fun to look up. Can you see the stars?

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File:Luminance vs angular size.svg
Luminance vs angular size.svg
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📚 Content adapted from Wikipedia | Readability: FK 12.8 | Vital Level 5