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xkcd #3063: Planet Definitions (xkcd.com)

submitted 1 month ago by [email protected] to c/[email protected]

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Under the 'has cleared its orbital neighborhood' and 'fuses hydrogen into helium' definitions, thanks to human activities Earth technically no longer qualifies as a planet but DOES count as a star.

https://explainxkcd.com/3063/

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[–] [email protected] 32 points 1 month ago (4 children)

He's mixed up the first two diagrams - Pluto should be coloured in for the first and not for the second.

[–] [email protected] 13 points 1 month ago

He fixed it. They're swapped now.

[–] [email protected] 11 points 1 month ago* (last edited 1 month ago)

This is really really frustrating to me, very unlike Randal.

What's worse is he's got Neptune's moon highlighted in the first row

[–] [email protected] 8 points 1 month ago* (last edited 1 month ago)

Ultratraditionalist is messed up too. The sun and moon were considered planets when geocentrism was king.

It comes from the fact that the word planet comes from the Greek and means wanderer. Any celestial body that wandered around compared to the stars was considered a planet.

[–] [email protected] 5 points 1 month ago (1 children)

The judgemental one has 7 coloured instead of 6 too.

[–] [email protected] 2 points 1 month ago

Good catch - he's updated the graphic but this is still wrong.