Explain xkcd is a wiki dedicated to explaining the webcomic xkcd. Go figure.
Fraunhofer Lines - Joachim Weise
UAH Global Temperature Update for August, 2021:+0.17 deg. C. « Roy
2004: Sun and Earth - explain xkcd
Sun's Spectrum Center For Science Education
TwoKinds [of] data - Page 2 - Twokinds Forums
1189: Voyager 1 - explain xkcd
509: Induced Current - explain xkcd
File:Exposure chart-XKCD.svg - Wikipedia
XKCD Isn't Funny: November 2016
xkcd: Pale Blue Dot
XKCD creator explains the solar system using only the most common
How do scientists know that the Sun is made of hydrogen? - Quora
The Laser Elevator – xkcd
the-red-spider-project/other/fortune.txt at master · the-xkcd