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Which part of the electromagnetic spectrum helped astronomers understand that the Crab Nebula contains hydrogen ?

Which part of the electromagnetic spectrum helped astronomers understand that the Crab Nebula contains hydrogen ?
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Which part of the electromagnetic spectrum helped astronomers understand that the Crab Nebula contains hydrogen ?

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User Justin Borromeo
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7 votes

Answer: visible lighttt

Step-by-step explanation:

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User Mike Duncan
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Answer: Visible light

Explanation: I got this wrong for you so be grateful

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User Kevmar
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