78
What if everything was antimatter EXCEPT Earth?
(www.youtube.com)
There wouldn't be an Earth for very long.
Thanks for this clever summary! Now there's no point in clicking the video /s
To be fair, that's not a particularly unusual end to xkcd What-If scenarios. The more interesting details are "how?" and "when?".
The aurora borealis would be amazing, for a limited time.
Certainly better than the one in my kitchen.
Can I see it?
No.
Unexpected !steamedhams@lemmy.ca
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.
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.
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.
Now we just gotta ramp up production at LHC. Nobody tell them what the antimatter is for.
The video doesn't mention the sun. Could an antimatter sun shine?
In fact, yes. Photons don't have a charge, so anti-photons would illuminate the Earth all the same. The issue, as the video points out, will come from too much energy hitting the Earth's surface, not too little.
in fact so far as i can tell, there wouldn't be anti-photons, they'd just be normal photons
Yep, anti-photons are just photons. They are their own counterpart.
EVIL antimatter sun that STEALS your light and heat
We would be completely fine if Chuck Norris was still alive.
this post was submitted on 17 Jun 2026
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