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<div style="float:right; margin: 0 0 1em 1em">{{Special:ContributionScores/10/7/nosort,notools}}<div style="font-size:0.85em; width:28em; font-style:italic">[[Special:ContributionScores|Lots of people]] contribute to make this wiki a success. Many of the recent contributors above have [{{fullurl:Special:Contributions|contribs=newbie}} just joined]. You can do it too! Create your account [[Special:UserLogin/signup|here]].</div></div>
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You can read a brief introduction about this wiki at [[explain xkcd]]. Feel free to [[Special:UserLogin/signup|create an account]] and contribute to the wiki! We need explanations for xkcd [[:Category:Incomplete explanations|comics]], [[:Category:Characters|characters]], [[What If? chapters|''What If?'' articles]], and [[:Category:xkcd|everything in between]]. If it is referenced in an [[xkcd]] comic, it should be here.
 
You can read a brief introduction about this wiki at [[explain xkcd]]. Feel free to [[Special:UserLogin/signup|create an account]] and contribute to the wiki! We need explanations for xkcd [[:Category:Incomplete explanations|comics]], [[:Category:Characters|characters]], [[What If? chapters|''What If?'' articles]], and [[:Category:xkcd|everything in between]]. If it is referenced in an [[xkcd]] comic, it should be here.

Revision as of 07:26, 30 May 2025

Welcome to the explain xkcd wiki!
We have an explanation for all 3212 xkcd comics, and only 62 (1.9%) are incomplete. Help us finish them!

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Latest comic

Binary Star
The discovery of a fully typographical star system comes with a big asterisk.
Title text: The discovery of a fully typographical star system comes with a big asterisk.

Explanation

While a "main sequence star" is a real celestial object, a five-pointed star is how stars are often drawn. The comic uses a drawn star shape to be a part of a celestial star system.

In reality pointed stars do not actually exist, it is just an optical illusion caused by the diffraction spike effect.

The title text similarly uses the * symbol (an asterisk - meaning little star), which is sometimes called a star, to be another real celestial star. A "big asterisk" is used as a metaphor for a rather large caveat, symbolizing a long footnote.

Transcript

[Graphical depiction of a binary star system. One star is revolving circularly close to the center of mass and is shown as a dot. The other has a visibly elliptic orbit located further and is currently close to its apastron. It's depicted as a pentagram.]
[Caption below the image:]
Space news: astronomers have found the first known system with a main-sequence star orbited by a five-pointed one.


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You can read a brief introduction about this wiki at explain xkcd. Feel free to create an account and contribute to the wiki! We need explanations for xkcd comics, characters, What If? articles, and everything in between. If it is referenced in an xkcd comic, it should be here.

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