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How would an alien civilization transmit an SOS signal for other sentient beings to pick up on?

They wouldn't as it would make no difference. By the time the signal reached anyone they would be long gone if they couldn't solve the problem themselves. But if they could then there is no reason for ...
Negdo's user avatar
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0 votes

How would an alien civilization transmit an SOS signal for other sentient beings to pick up on?

Send an envoy I am writing a story where an alien species has this problem. My take on this is that if you are advanced enough, you should be able to accelerate stuff to near light speeds (and ...
The Square-Cube Law's user avatar
1 vote

How would an alien civilization transmit an SOS signal for other sentient beings to pick up on?

Extraterrestrials could broadcast their existences through various mediums (such as radio waves, photon waves, xrays, gamma rays, ...) to broadcast maths (such as calculus, or universal constants.) To ...
Swudu Susuwu's user avatar
-1 votes

How close can I get to a nuclear explosion with extreme shielding?

At LEAST 10km Required There's a fun website out there called nukemap that lets you explore nuclear explosions. For a 15MT explosion at ground level, it expects a crater over 200m deep, and nearly ...
codeMonkey's user avatar
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0 votes

Would a replicator plague be sufficient to destroy an advanced (interplanetary) civilization and leave very little evidence?

The replicators were not weapons of war per say, they were tools for terraforming Terraforming is not a simple task. Once you make a world habitable, it takes a lot of maintenance to keep it that way ...
Nosajimiki's user avatar
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0 votes

Would a replicator plague be sufficient to destroy an advanced (interplanetary) civilization and leave very little evidence?

Hard No Even if your replicator were to turn every artifact of civilization into dirt, it would still leave things that we would recognize as artificial. When we look at rocks, even hundreds of ...
Robert Rapplean's user avatar
1 vote

How to improve TCP/IP for an interplanetary WAN?

As an old fart in the IT industry, I'd like to point out that you almost certainly cannot use TCP/IP for interplanetary communication. While it can function on extremely long latency connections, you ...
Corey's user avatar
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1 vote

Would a replicator plague be sufficient to destroy an advanced (interplanetary) civilization and leave very little evidence?

Our nature is the result of a replicator plague. Millions of years ago, earth was a different eco-system entirely, then a replicator capable of producing oxygen, started producing what for the ...
Pica's user avatar
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5 votes
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Could a Chthonian planet develop life?

A magnetosphere might be possible, depending on the composition of the chyhonian planet. And it may get the chemicals needed for life by chance. By going rogue and then being captured by a star that ...
The Square-Cube Law's user avatar
5 votes

Could a Chthonian planet develop life?

No Surface Water While rocky planets have a great variety of surface features it is very unlikely that water is present. At least near the surface. Like the Moon and Mars, hydrogen and helium are the ...
Menno van Lavieren's user avatar
3 votes

Could a Chthonian planet develop life?

Maybe I assume your planet is not too hostile because otherwise the question would be pointless. Since we still don't know how life begin, ie. abiogenesis is still a mystery, a definite "yes"...
Jani Miettinen's user avatar
3 votes

Engine most likely to be available in the next 80 years to accelerate a craft at 1g for 4 weeks

It’s conceivable that a Starwisp might achieve that kind of number within eighty years, a very tiny spacecraft (orders of magnitude too small for human passengers, but size wasn’t included in your ...
Mike Scott's user avatar
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11 votes
Accepted

Engine most likely to be available in the next 80 years to accelerate a craft at 1g for 4 weeks

The actual requirements of your engine First, let's enumerate the actual requirements for your engine. The engine needs to be able to produce 1 g for four weeks (equivalent to 23,732,352 m/s of delta-...
controlgroup's user avatar
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