#3208: SNEWS
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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.