Comments on: The smallest detail visible on the Sun with ground based telescopes is about 1 second of arc. How large of a r? http://chaoticastronomy.com/telescopes/the-smallest-detail-visible-on-the-sun-with-ground-based-telescopes-is-about-1-second-of-arc-how-large-of-a-r Sun, 18 Jul 2010 13:26:59 +0000 hourly 1 http://wordpress.org/?v=3.0.3 By: sageofstars http://chaoticastronomy.com/telescopes/the-smallest-detail-visible-on-the-sun-with-ground-based-telescopes-is-about-1-second-of-arc-how-large-of-a-r/comment-page-1#comment-379 sageofstars Tue, 01 Dec 2009 09:21:59 +0000 http://chaoticastronomy.com/telescopes/the-smallest-detail-visible-on-the-sun-with-ground-based-telescopes-is-about-1-second-of-arc-how-large-of-a-r#comment-379 The Sun is about 865,000 mi. in diameter and appears about 1/2 degree in the sky. There are 60 arcminutes in a degree and 60 arcseconds in an arcminute. This means you divide 865,000 mi by 1800 = 481 miles across. There are interferometers that see better than 1 second of arc.<br><b>References : </b><br> The Sun is about 865,000 mi. in diameter and appears about 1/2 degree in the sky. There are 60 arcminutes in a degree and 60 arcseconds in an arcminute. This means you divide 865,000 mi by 1800 = 481 miles across. There are interferometers that see better than 1 second of arc.
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]]> By: Randy P http://chaoticastronomy.com/telescopes/the-smallest-detail-visible-on-the-sun-with-ground-based-telescopes-is-about-1-second-of-arc-how-large-of-a-r/comment-page-1#comment-378 Randy P Tue, 01 Dec 2009 09:12:59 +0000 http://chaoticastronomy.com/telescopes/the-smallest-detail-visible-on-the-sun-with-ground-based-telescopes-is-about-1-second-of-arc-how-large-of-a-r#comment-378 1 second of arc = 1/3600 degree = (1/3600)*(180/pi) radians Linear distance = angle in radians * distance to sun<br><b>References : </b><br> 1 second of arc = 1/3600 degree = (1/3600)*(180/pi) radians

Linear distance = angle in radians * distance to sun
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