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I think this means that their are many adsorptions occurring at the lower wavelengths. But why could this be? What does this say about the star? What I was thinking is that it could imply that the star is surrounded by a large amount of hydrogen gas (a hydrogen gas cloud) but that doesn't seem to sound right.

Any help?

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why doesn't your intuition sound right? Stars get their energy from fusing hydrogen together , and our star (sun) has a hydrogen cloud surrounding it...enter image description here

For absorption lines the light Ray's have to pass through "something"

I think my answer is pretty close. :)

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