#3203: Binary Star
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[Graphical depiction of a binary star system. The orbits are shown with dashed lines. One star is revolving circularly close to the center of mass and is shown as a filled circle. The other has a very elliptic orbit further out. It is currently close to its furthest point from the other star. This star is 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.
(Sourced from explainxkcd.com)
Title text:The discovery of a fully typographical star system comes with a big asterisk.