Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.astronomy.com/magazine/erika-rix/2013/04/filtered-solar-views
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FROM THE June 2013 ISSUE

Filtered solar views

June 2013: We have never had a better opportunity to safely observe the Sun from the comfort of our backyards.
By Erika Rix Òš|Òš Published: Monday, April 22, 2013
RELATED TOPICS: ASTROSKETCHING
Erika-Rix
With the range of filters and telescopes available for solar observing these days, we have never had a better opportunity to safely observe the Sun from the comfort of our backyards. Amateur astronomers can now do that in two ways: Observe a wide swath of wavelengths that make up visible light, or restrict the view to a single wavelength, Hydrogen-alpha.

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