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Astronomy and Cosmology
Astronomy and Astrophysics
Why are emission spectra of stars rarely shown?
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[QUOTE="sophiecentaur, post: 6502608, member: 199289"] Should be a doddle? No. The brightness of the Sun's disc is so great that there is far too much 'spillage' of light on its path through the atmosphere to get the detail that a total eclipse can give us. It is possible to get an imperfect image of the corona with a terrestrial [URL='https://en.wikipedia.org/wiki/Coronagraph']coronagraph[/URL] telescope. This puts a disc over the intermediate image inside the scope which covers the Sun's main part. But it only takes you so far. You can't get away from the effects of the atmosphere. Hubble does some solar measurements by this method ( a different camera from the deep space one!) An alternative would be to use a large disc at some distance in front of a space telescope to produce your own 'eclipse' but it all needs to be out in space and carefully guided. [/QUOTE]
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Astronomy and Cosmology
Astronomy and Astrophysics
Why are emission spectra of stars rarely shown?
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