#3208: SNEWS

XKCD comic, described below.
Transcript
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[Ponytail is walking into her room. The room has a bed, a set of drawers and a large sci-fi device mounted on the ceiling. Hairy is standing in the room, pointing up at the device.]

Hairy: What's that device?

Ponytail: Part of the supernova early warning system.

Ponytail: There hasn't been a Milky Way supernova in over a century.

Ponytail: Astronomers don't want to miss the next one.

[Close up of Ponytail, now sitting on the end of the bed]

Ponytail: 20 years ago, we set up a supernova alert system using neutrino detectors.

Ponytail: It should give us a few hours' advance notice.

[In a frame-less panel the view zooms back out, showing Ponytail and Hairy.]

Ponytail: If it ever goes off, every astronomer on earth will scramble to point their equipment at the sky.

Hairy: Oh, OK. So is that a detector? Or some kind of telescope?

[The panel moves to the right, showing Hairy walking away. Ponytail is still on the end of the bed, raising a clenched fist for dramatic effect.]

Ponytail: Fireworks launcher.

Ponytail: I refuse to sleep through a supernova.

Hairy: I think I'll spend the night at my place instead.


(Sourced from explainxkcd.com)

Title text:People say setting of fireworks indoors is dangerous, but I looked at their energy release and it's like 10^-40 foe; totally negligible.


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