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xkcd #3096: Check Engine
(imgs.xkcd.com)
Title text:
They say it's probably safe to keep orbiting for a while, but if it stays on or starts flashing we might have to call someone.
Transcript:
[A pattern in the form of a "check engine" light (as displayed on a car's instrument panel) is shown on the surface of the Sun, in the bottom right quarter. The pattern has a pictogram of a motor on the top and the text "Check Engine" below it, both in orange inside a black square, matching the orange color of the Sun.]
[Caption below the panel:]
This new sunspot cluster has raised concern among astronomers
Source: https://xkcd.com/3096/
