https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&feedformat=atom&user=173.245.53.176 2026-04-17T05:22:43Z User contributions MediaWiki 1.30.0 https://www.explainxkcd.com/wiki/index.php?title=Talk:1342:_Ancient_Stars&diff=62695 2014-03-14T08:32:37Z

<p>173.245.53.176: Created page with &quot;I knew this because Nick Cave's 2013 album *Push The Sky Away* includes the lyrics &quot;Sirius is eight point six light years away / Arcturus is thirty seven / The past is the pas...&quot;</p> <hr /> <div>I knew this because Nick Cave's 2013 album *Push The Sky Away* includes the lyrics &quot;Sirius is eight point six light years away / Arcturus is thirty seven / The past is the past and it's here to stay / Wikipedia is heaven&quot;. Obviously Randall has been listening to it! ;-) [[Special:Contributions/173.245.53.176|173.245.53.176]] 08:32, 14 March 2014 (UTC)</div>

173.245.53.176 https://www.explainxkcd.com/wiki/index.php?title=1308:_Christmas_Lights&diff=55938 2013-12-25T20:30:56Z

<p>173.245.53.176: Transcript added</p> <hr /> <div>{{comic<br /> | number = 1308<br /> | date = December 25, 2013<br /> | title = Christmas Lights<br /> | image = christmas_lights.png<br /> | titletext = Merry Christmas from xkcd!<br /> }}<br /> <br /> ==Explanation==<br /> {{incomplete|Check grammar, check spectra and reference good fits to what is here}}<br /> Each light in this Christmas scene is represented by its {{w|electromagnetic spectrum}}, which shows in a graphical form how much energy is radiated by each wavelength of light.<br /> <br /> These graphs cover only the visible radiation plus some infrared and some ultraviolet. There are 4 distinct spectra in this comic:<br /> <br /> In the center of the image, between Beret Guy and the couple Cueball and Megan appears a light spectrum of a fire, notable because it emits a lot of energy in the infrared band (The left zone of the spectrum), emitted typically from hot sources, and in the red and orange zone (typical colors of a fire)<br /> <br /> In the right of the comic appear some spectra arranged in the form of a Christmas tree. There are 3 different spectra in this &quot;Christmas tree&quot;:<br /> <br /> At the top appears a complex spectrum, possibly that of a white LED (see [http://led-brdf.wikispaces.com/Introduction+to+LEDs here]), representing the tradition in some cultures of putting a star at the top of the Christmas tree.<br /> <br /> In the branches there are two simpler spectra, one with a peak in the green zone, representing a green LED, and other with a peak in the red zone, representing a red LED, both of them represent the tradition of putting colorful decoration in the tree, especially colored balls.<br /> <br /> ==Transcript==<br /> Merry Christmas from xkcd!<br /> <br /> {{comic discussion}}<br /> [[Category:Comics featuring Megan]]<br /> [[Category:Comics featuring Cueball]]<br /> [[Category:Comics featuring Beret Guy]]<br /> [[Category:Comics with color]]</div>

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