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How to protect a water planet within a water ring of a quasar from radiation?

Have a shield planet, further in- some gas giant, throwing a massive magnetic cone, protecting you from solarwinds and using its mass to shield you from other radiation. If its getting properly cooked,...
Pica's user avatar
  • 2,259
6 votes

How would fire behave in an oxygenless atmosphere with a significant percentage of chlorine?

Chlorine is perfectly fine oxidiser for your flame. In fact, there is no reason why your race wouldn't breathe it! If they were bioengineered to thrive in this environment that would be the perfect ...
Negdo's user avatar
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7 votes
Accepted

How would fire behave in an oxygenless atmosphere with a significant percentage of chlorine?

Oxygen is an excellent oxidizer, however Chlorine is perfectly effective as well. Chlorine will support a fire almost as well as oxygen. As Stephen said, fluorine is also an excellent answer for your ...
alkahest's user avatar
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4 votes

How would fire behave in an oxygenless atmosphere with a significant percentage of chlorine?

Chlorine would make a perfectly acceptable oxidising agent for fire. It has a slightly greater reduction potential than oxygen so 'stuff' would burn slightly more energetically, but otherwise with no ...
Stephen's user avatar
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2 votes

How would fire behave in an oxygenless atmosphere with a significant percentage of chlorine?

To make fire you need a combustible and an oxidiser, which doesn't have to be necessarily oxygen. Halogens work pretty well as oxidisers too. Your fire would behave in the same way, just the flame ...
L.Dutch's user avatar
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1 vote

How would fire behave in an oxygenless atmosphere with a significant percentage of chlorine?

You could just have less oxygen. This paper simulates burning of various objects in the Mesozoic era. suggests that forest fires may be harder to start if you went down to 15% oxygen, rather than the ...
Richard Kirk's user avatar
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2 votes

Could these Tectonic Plates produce my map's landforms?

No. If we look at real-world plate tectonics, convergent plates such at the main northern plate and the plate north of plates 1 and 2 that is moving northward should produce a mountain range around ...
Monty Wild's user avatar
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4 votes

How many distinct colors would tetrachromatic birds have?

As many as they need. Other answers have pointed out that the number of "basic" colours are very much cultural. The reason for this is that people have had different needs. If someone don'...
Stig Hemmer's user avatar
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6 votes

How many distinct colors would tetrachromatic birds have?

It isn't clear, is it? The Munsell colour atlas has 330 colours. These are not individually named colours, though they do have a unique code for each. But they are a fair representation of the colours ...
Richard Kirk's user avatar
  • 7,825
5 votes

How many distinct colors would tetrachromatic birds have?

More than us but that is all you can say the exact line between colors are largely cultural, as is how many colors there are. But although the number is cultural the pattern of which colors they have ...
John's user avatar
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23 votes
Accepted

How many distinct colors would tetrachromatic birds have?

Insufficient data. The number of minimally-distinguishable colors that a creature can distinguish is totally separate from the dimensionality of their color space. Humans can distinguish tens of ...
Logan R. Kearsley's user avatar
3 votes

How many distinct colors would tetrachromatic birds have?

Artists (as opposed to physicists), tend to describe three primary colours red, yellow, and blue. Equal mixtures of these produce three secondary colours - orange (RY), green (YB), and purple (BR). ...
Penguino's user avatar
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6 votes

How could a speedster function in real life. Part 1:Acceleration

Accelerating a human body of mass 100 kg to Mach 5 in 1 to 10 seconds requires applying a force on it between 17 and 170 kN, or between 17 and 170 times its own weight. No human body can resist those ...
L.Dutch's user avatar
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2 votes

Industrial applications of high gravity

Perhaps the best reason for humans to be there is to study the biosphere and the flora and fauna on such an extreme world and to investigate what adaptions have been made to cope, especially the ...
Slarty's user avatar
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10 votes

How could a speedster function in real life. Part 1:Acceleration

They can't. There are many problems with this but the simplest is energetic. An object in motion has a kinetic energy equal to one-half its mass times its velocity squared. Mach 5 is about 1700 m/s, ...
Cadence's user avatar
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10 votes
Accepted

Could black holes be used to warp a laser transmission back to the point of origin?

Yes Light rays that pass close to the black hole get caught and cannot escape. Therefore, the region around the black hole is a dark disk. Light rays that pass a little further away don't get caught ...
JBH's user avatar
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6 votes

What is the minimum level of technology needed to explore a large flood volcanism event?

Exploring hot basalt lava is fairly easy. Simply walk up to a point where you can watch it. See the recent tourism in Iceland to watch the lava flow or the tourist boats to watch Hawaii build new land....
David R's user avatar
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1 vote

Why are scout bots only used for reconnaissance?

The robots are tiny The enemy have powerful anti-robot countermeasures, (EMP weapons or what have you). So our heroes have found the best way of maintaining stealth is for the robots themselves to be ...
komodosp's user avatar
  • 9,379
2 votes

Industrial applications of high gravity

Humankind wants to have fast space ships whose acceleration is at least 2 g, maybe 3g. They want to study how the body can be adjusted to such conditions for prolonged time. Doing so on a planet is ...
Jani Miettinen's user avatar
0 votes

Hiding a star cluster

Alternative version of my answer :). (replace star with center of nebula and adjust distances as necessary) Don't hide anything. Just choose nebula located in places where setting's regular ...
Tauri's user avatar
  • 328
6 votes

Industrial applications of high gravity

ErikHall's answer calculates that the density of Mesklin should be about 19.702 grams per cubic centimeter. And many have said how improbable a world with such a density would be. As a matter of fact, ...
M. A. Golding's user avatar
4 votes

Industrial applications of high gravity

Entertainment There are people in the real world that pay actual money to see things like Jackass and team sports. Under higher gravity, these kinds of shows would be even more entertaining to watch. ...
The Square-Cube Law's user avatar
5 votes

Industrial applications of high gravity

Leaving aside what prevents such a planet from instantly imploding into a very small black hole. . . Let me do some math... So Mesklin is said to have a Polar diameter of 31770 km and a equatorial ...
ErikHall's user avatar
  • 2,108
10 votes

Industrial applications of high gravity

There is a somewhat frame-challengish answer here - depending on how broadly you define industrial... Training of Soldiers Especially if those people are born and raised in the higher gravity ...
TheDemonLord's user avatar
  • 22.4k
23 votes
Accepted

Industrial applications of high gravity

Frame Challenge: Setting realistic expectations It is not possible for any astral body to have a surface gravity of 700g. The highest theoretical surface gravity of any rocky or icy planet is about 3....
Nosajimiki's user avatar
  • 90.1k
3 votes

Industrial applications of high gravity

Filtration is the first thing that comes to mind: high gravity would amplify the differences in specific weight between similar species, making separation more easy. Think, for an example, to the ...
L.Dutch's user avatar
  • 283k
2 votes

Industrial Geothermal smelting power

Perhaps the volcano has numerous fumaroles, producing unusually hot gasses. Although smelting of most metals is out of reach of even high temperature fumaroles, there are many other processes which ...
Jack B's user avatar
  • 401
1 vote

What is the most logical way to have my dragon breathe lightning?

Please forgive my original answer here. I am proud of the mathing there, but I was ultimately being an ass. I love sci-fi and fantasy and I am not picky like that when I'm resding stuff I like. So let'...
The Square-Cube Law's user avatar
0 votes

Hiding a star cluster

Go Pure Communism Since the goal is to be left alone, not be unnoticed at all, you don't need to hide the existence of the star systems. You just need to make sure there are no opportunities for ...
Nosajimiki's user avatar
  • 90.1k
2 votes

Industrial Geothermal smelting power

Heat may melt metals. Water is not hot enough, so you have to use the lava directly. Lava moves unpredictably, so you cannot build a factory for this purpose. People may approach the edge of a slow ...
Helge Hafting's user avatar
2 votes

Industrial Geothermal smelting power

The first thing that comes to mind when reading your question is Iceland, known for abundant sources of geothermal energy and also having a functional manufacturing industry including smelting ...
FlightDeck0112's user avatar
2 votes

Why are scout bots only used for reconnaissance?

While sending robotic scouts with lethal capabilities has advantages, here are some reasons why humans might still be required for the final confrontation: Decision-making and adaptability: While your ...
Creative Mania's user avatar
1 vote

Industrial Geothermal smelting power

Sure. A Stirling engine is one efficient way to use a heat gradient. But any heat gradient can turn into motion, and any motion can power dynamos. So you have a source of electricity regardless of ...
fectin's user avatar
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0 votes

Industrial Geothermal smelting power

Great news everyone! So heat can be used to make electricity, electricity can be used to make hydrogen. Hydrogen can be used to make steel. https://worldsteel.org/wp-content/uploads/Fact-sheet-...
Pica's user avatar
  • 2,259
4 votes

Industrial Geothermal smelting power

No. Geothermal heat doesn't get hot enough. The hottest water found in Yellowstone is deep-level brine at about 200 °C. The hottest subsea vents are about 400 °C. Very few ores can be smelted at ...
Mark's user avatar
  • 17.4k
0 votes

Industrial Geothermal smelting power

Due to this, they know they could use electricity using a Stirling engine to smelt metals, but they lack any graphite deposits to use as electrodes due to the being over a volcano. Steam power might ...
Christopher James Huff's user avatar
0 votes

Hiding a star cluster

Some weapons never get developed, when the "counter" weapon system seems far ahead and way to advanced. Plate armor was mainly developed for cavalary so anything that would kill/incapacitate ...
Pica's user avatar
  • 2,259
9 votes
Accepted

Industrial Geothermal smelting power

I can't argue with @L.Dutch's answer and I upvoted it But let's add to the list of reasons why this can't work in a science-based context. Exposed lava is a dangerous creature. It exists because of ...
JBH's user avatar
  • 120k
4 votes

What is the most logical way to have my dragon breathe lightning?

Have you considered having the dragon spit something that is electrically conductive? Similar to the napalm breath in reign of fire. It wouldn't need to be a constraint stream, just dense enough that ...
Seph's user avatar
  • 141
2 votes

What is the most logical way to have my dragon breathe lightning?

If you look into either modern warfare or actual real animals you will find shooting lightning streams is not a viable weapon. This is because a lightning is a chaotic phenomenon that will flow ...
N1ngu's user avatar
  • 121
10 votes

Industrial Geothermal smelting power

It's going to be difficult, for various reasons: while it's true that lava has a temperature in the range of 800 to 1200 C, geothermal heat is not necessarily in that range, it can be lower. to smelt ...
L.Dutch's user avatar
  • 283k
4 votes

Hiding a star cluster

Hide in bureaucracy As other answers have explained, physically hiding is pretty much impossible at that level of technology. Similarily, hiding by erasing database entries, or making the stars ...
Syndic's user avatar
  • 6,552
3 votes

What is the most logical way to have my dragon breathe lightning?

I suggest go with an electric eel your shock, but to direct the discharge through the air have the dragon breathe out ionised air. A lightning conductor works because it is a point that is close to ...
David's user avatar
  • 131
5 votes

What is the most logical way to have my dragon breathe lightning?

Frame challenge: The electricity does not come from the head end of the dragon. Premise 1: As mentioned in the original question, electric eels are one of the few known creatures to use electric ...
Atog's user avatar
  • 3,412
4 votes

What is the most logical way to have my dragon breathe lightning?

You have a tiny (huge) problem here: the return path. Natural lightning is the result of the discharge of a natural capacitor. In order to fire lightning your dragon must somehow have a capacitor ...
Loren Pechtel's user avatar
0 votes

Could a bird evolve into something like a Gryphon?

First Problem; You'd have to posit an ancestral hexa-pedal life form, probably an entire evolutionary clade of 6 limbed animals (probably aboreal) that co-existed with quadrupedal species. Something ...
Mon's user avatar
  • 16.1k
0 votes

Could a bird evolve into something like a Gryphon?

Naturally, no. In history the biggest birds that still could fly were the Haast's eagles with a wingspan of 3m, and still those flying giants only weighted 15Kg and couldn't carry much. If we go ...
Sasha's user avatar
  • 5,955
2 votes

Hiding a star cluster

Find yourself a rouge planet that is not orbiting any star. It will probably be very hard to find in the first place. But that's the point. If the planet has a geologically active core full of ...
user4574's user avatar
  • 3,693
21 votes

What is the most logical way to have my dragon breathe lightning?

Have you considered magic? TL;DR if you want lightning, handwave it. You have already handwaved biology, physics and chemistry away anyway just to have the dragon itself. Hi, I am the dreaded Square-...
The Square-Cube Law's user avatar
4 votes

What is the most logical way to have my dragon breathe lightning?

There is laser-triggered switching, and it has ben used to direct lightning. The idea is to create an ionization path between the dragon and its target as Robert Rapplean said. However, lightning is ...
Christmas Snow's user avatar

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