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nrod1120 nrod1120
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3 days ago

What evidence can be used to show that space is not a vacuum?



ultraviolet radiation emitted by dust



narrow emission lines seen in stellar spectra



the presence of bright nebulae



the blue colour of stars seen near dark regions

Textbook 
ASTRO

ASTRO


Edition: 3rd
Authors:
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mkql12mkql12
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3 days ago
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nrod1120 Author
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3 days ago
Brilliant
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Yesterday
Good timing, thanks!
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2 hours ago
Thanks for your help!!
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