explain xkcd - User contributions [en]

https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&feedformat=atom&user=BadAstronomy explain xkcd - User contributions [en] 2026-04-18T22:28:28Z User contributions MediaWiki 1.30.0 https://www.explainxkcd.com/wiki/index.php?title=2748:_Radians_Are_Cursed&diff=307484 2748: Radians Are Cursed 2023-03-10T19:34:35Z

<p>BadAstronomy: </p> <hr /> <div>{{comic<br /> | number = 2748<br /> | date = March 10, 2023<br /> | title = Radians Are Cursed<br /> | image = radians_are_cursed_2x.png<br /> | imagesize = 394x437px<br /> | noexpand = true<br /> | titletext = Phil Plait once pointed out that you can calculate the total angular area of the sky this way. If the sky is a sphere with radius 57.3 degrees, then its area is 4*pi*r^2=41,253 square degrees. This makes dimensional analysts SO mad, but you can't argue with results.<br /> }}<br /> <br /> ==Explanation==<br /> {{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br /> <br /> Title text is refering to Phil Plait's claim about the size of the sky, which was published on his blog: http://www.badastronomy.com/bitesize/bigsky.html<br /> Dimensional analysis utilizes the rational that both sides of an equation need to have the same unit. Radius typically refers to a length, which has SI units of meters. The surface area has SI units of square meters. The units of Phil Plait's "angular area" is as the title text mentions, square degress, a unit not used in any scientific unit system.<br /> <br /> ==Transcript==<br /> {{incomplete transcript|Do NOT delete this tag too soon.}}<br /> <br /> :<u>Math facts</u><br /> <br /> :The unit circle has a radius of one&nbsp; <span style="color:green>✓ Normal</span><br /> :One radian equals the length of a circle’s radius&nbsp; <span style="color:green>✓ Normal</span><br /> :One radian is 57.3 degrees&nbsp; <span style="color:green>✓ Normal</span><br /> :The unit circle has a radius of 57.3 degrees&nbsp; <span style="color:darkred>X Cursed</span><br /> <br /> {{comic discussion}}<br /> <br /> [[Category:Math]]</div>

BadAstronomy https://www.explainxkcd.com/wiki/index.php?title=2748:_Radians_Are_Cursed&diff=307482 2748: Radians Are Cursed 2023-03-10T19:28:25Z

<p>BadAstronomy: </p> <hr /> <div>{{comic<br /> | number = 2748<br /> | date = March 10, 2023<br /> | title = Radians Are Cursed<br /> | image = radians_are_cursed_2x.png<br /> | imagesize = 394x437px<br /> | noexpand = true<br /> | titletext = Phil Plait once pointed out that you can calculate the total angular area of the sky this way. If the sky is a sphere with radius 57.3 degrees, then its area is 4*pi*r^2=41,253 square degrees. This makes dimensional analysts SO mad, but you can't argue with results.<br /> }}<br /> <br /> ==Explanation==<br /> {{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br /> <br /> Title text is refering to Phil Plait's claim about the size of the sky, which was published on his blog: http://www.badastronomy.com/bitesize/bigsky.html<br /> ==Transcript==<br /> {{incomplete transcript|Do NOT delete this tag too soon.}}<br /> <br /> Math facts:<br /> <br /> The unit circle has a radius of one. (Check mark)<br /> One radian equals the length of a circle’s radius. (Check mark)<br /> One radian is 57.3 degrees. (Check mark)<br /> The unit circle has a radius of 57.3 degrees. (Red X)<br /> <br /> ok idk how to do transcripts someone help<br /> <br /> {{comic discussion}}</div>

BadAstronomy https://www.explainxkcd.com/wiki/index.php?title=2748:_Radians_Are_Cursed&diff=307481 2748: Radians Are Cursed 2023-03-10T19:27:02Z

<p>BadAstronomy: </p> <hr /> <div>{{comic<br /> | number = 2748<br /> | date = March 10, 2023<br /> | title = Radians Are Cursed<br /> | image = radians_are_cursed_2x.png<br /> | imagesize = 394x437px<br /> | noexpand = true<br /> | titletext = Phil Plait once pointed out that you can calculate the total angular area of the sky this way. If the sky is a sphere with radius 57.3 degrees, then its area is 4*pi*r^2=41,253 square degrees. This makes dimensional analysts SO mad, but you can't argue with results.<br /> }}<br /> <br /> ==Explanation==<br /> {{incomplete|Created by a BOT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}<br /> <br /> <br /> Phil Plaits claim about the size of the sky: http://www.badastronomy.com/bitesize/bigsky.html<br /> ==Transcript==<br /> {{incomplete transcript|Do NOT delete this tag too soon.}}<br /> <br /> Math facts:<br /> <br /> The unit circle has a radius of one. (Check mark)<br /> One radian equals the length of a circle’s radius. (Check mark)<br /> One radian is 57.3 degrees. (Check mark)<br /> The unit circle has a radius of 57.3 degrees. (Red X)<br /> <br /> ok idk how to do transcripts someone help<br /> <br /> {{comic discussion}}</div>

BadAstronomy