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What would be the easiest way to OBLITERATE THE ENTIRE PLANET?


Kerbface
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36 minutes ago, kerbiloid said:

1.Say, a 20 km thick (high? deep?) layer of slaughterbots would be crushing any bot beneath. So, probably that would be the same planet with the upper lythosphere consisting of bots.
2.The bots need a lot of energy to extract the metals from oxides. Sun is poor one for a thick bot layer.
3.The bots produce energy and need a cooling. No cooling on several kilometer depth. They would melt.
4.The bots would be made of metals, so they should throw out the pure oxygen. A pure oxygen atmosphere would burn and melt the upper layers of bots.

It's more of a genocide weapon than a planet dissolver. (this goes for most other options too)

50 minutes ago, kerbiloid said:

If treat that 43 kJ/kg as a kynetic energy, delta-V ~= (43000 * 2)1/2 = 300 m/s.
Not enough to significantly change the Earth orbit.

But enough to significantly change the orbit of, say, Mars for example. Enough to collide it with Earth, possibly.

51 minutes ago, kerbiloid said:

Total available fusion energy calculated above is 2.6*1029 J.
If the rock velocity is 15 km/s, it is like a 2.3*1021 kg rock, i.e.3% of the Moon. It is like a total asteroid belt mass, but as you can see above, doesn't eliminate the planet at all.

15km/s? Even diverting something from the Kuiper Belt would take a tiny portion of that.

55 minutes ago, kerbiloid said:

To produce antimatter one should spend more energy than it holds.
So, total available antimatter energy would be several times lower than the mentioned total fusion energy. Just more compact.

Make a small dyson swarm around the sun and aquiring energy won't be a problem.

57 minutes ago, kerbiloid said:

If you can turn a Sun, you don't need a beam to turn the Earth. Just do it directly.

It takes far less energy to build such a weapon than it would to destroy a planet with it.

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