submitted 3 weeks ago by schnurrito@discuss.tchncs.de to c/xkcd@lemmy.world

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[-] Treczoks@lemmy.world 7 points 3 weeks ago

We would be long gone. Can you imagine what a football-sized (or even bigger) antimatter meteorite would do?

Hint: six to seven grams of antimatter is the equivalent of the bomb that took out Hiroshima.

[-] teft@piefed.social 4 points 3 weeks ago

6 to 7 grams? No. 1/4 of a gram of antimatter reacting with 1/4 gram of matter is just about the right mix. That’ll be around 15 kilotons.

[-] Treczoks@lemmy.world 5 points 3 weeks ago

I re-did the calculation. You are closer, but the conversion of half a gram yields about 10 kilotonnes. Makes the meteorite a bit worse.

Calculation based on 4'184'000'000'000 joules per kiloton TNT.

[-] teft@piefed.social 3 points 3 weeks ago* (last edited 3 weeks ago)

Now we just gotta ramp up production at LHC. Nobody tell them what the antimatter is for.

this post was submitted on 17 Jun 2026

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