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Q&A How efficient can a Dyson sphere be?

I think a reasonable assumption is that you don't want to accumulate entropy from the Dyson sphere. That is, the entropy you get from the star must not be lower than the entropy you send to outer s...

posted 3y ago by celtschk‭  ·  edited 3y ago by celtschk‭

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Q&A Do seasons occur on a tidally-locked planet?

Both the other answers (at this time) suggests making the orbit eccentric. The variable distance from the sun makes the planet hot or cold. This is correct. But there is one important aspect of ...

posted 4y ago by Stig Hemmer‭

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Q&A What organs or modification needed to have tree that gain energy from lightning or electricity?

As L.Dutch said, lightning is super energetic and any plant probably wouldn't survive it's strike. What I can imagine is the forest benefiting from some of its trees taking the hit for the team and...

posted 4y ago by Kechl‭

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Q&A Do seasons occur on a tidally-locked planet?

Depends on the orbit I'm drawing on my answer to a different question here. Let's start with an overview of why there are seasons. I really like this description: We have seasons because the e...

posted 4y ago by Andrew Brēza‭

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Q&A Can velocity drift be used to calculate a radio wave source's distance from Earth?

Yes, it can. We can determine the distance to the source if we have an idea of what's causing that shift in velocity. Let's say that we have a source moving at a speed $v$ away from us. If it emit...

posted 4y ago by HDE 226868‭  ·  edited 4y ago by HDE 226868‭

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Q&A How large would be the habitable area in a tidally locked planet?

It would depend on the eccentricity of the orbit and the size of the orbit. So there are a number of orbital possibilities to consider. The problem even more complex because of a number of other va...

posted 4y ago by Slarty‭

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Q&A biologically or anatomically is there a problem with this type of double mouth or jaws?

Not gonna lie here, that looks way more like an disadvantage than an advantage. The main problem here is that this seems like an unnecessary redundancy. Yes, morays have 2 sets of Jaws, but the se...

posted 4y ago by ProjectApex‭

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Q&A Are these traits for my planet mathematically accurate? Could it support life?

Your star is not going to work, so the planet won't either. Mass of star: 1.04 M☉ Radius of star: 0.69 R☉ Surface temperature of star: 4,620° K Luminosity of star: 0.2 L☉ ...

posted 4y ago by StephenG‭

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Q&A How could the display technology of self-rewriting books work?

Leaving aside the durability issue, you should probably be looking at electronic paper. They work by moving colored particles back and forth to create the image. The term you're looking for is call...

posted 4y ago by ltmauve‭

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Q&A An alternative way to rotate or in this case rolltate

No. The way we define latitude and longitude is based on the planet's axis of rotation. You can certainly (AFAIK) have a planet with a 90° axial inclination, or (probably) a planet that is identica...

posted 4y ago by Matthew‭  ·  edited 3y ago by Matthew‭

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Q&A Inverse orbital direction

For an in-situ born planet, it can happen, though it is hard to have the exact chain of events. Basically you need to have a series of gravitational slingshots with a larger body that put your pla...

posted 4y ago by L.Dutch - Reinstate Monica‭

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Q&A Constructing a doomsday machine by manipulating the Higgs Field?

I think that this topic is one that's likely to generate a lot of misconceptions when people answer it, since it's a complicated topic and analogies/explanations that are given by pop science are o...

posted 4y ago by el duderino‭

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Q&A Feasibility of a black-and-white FTL drive?

Let me see if I got this right. You want to conjure an object, have it contain enough mass and gravity to collapse on itself without dissipating, motivate it to move at FTL speed, drag your vesse...

posted 4y ago by Dale Gusta‭

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Q&A If an ET has caramel blood, what it implies?

Interpretation: ET's blood equivalent is primarily composed of caramel, with some additional components, but without hemoglobin. The flesh tastes terrible, without rendering the caramel blood ined...

posted 4y ago by rytan451‭  ·  last activity 4y ago by rytan451‭

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Q&A Adjusting to the Sound of a Waterfall

I'd imagine that they'd build double skinned shield walls to deflect the noise from waterfalls. The most expensive parts of the city would also be the quietest, while the slums would be where the s...

posted 4y ago by Phoenix Stoneham‭

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Q&A Could power be generated using the temperature difference in venus's atmosphere?

100% YES It s called an updraft tower. You can actually even do that on earth in the Deserts (solar updraft towers). https://en.wikipedia.org/wiki/Solar_updraft_tower On Venus you wouldn't even...

posted 4y ago by Fred‭

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Q&A What organs or modifications are need for a biological creature to develop lethal force as a poop machine gun?

TL;DR: the mechanical issues of a biological gun would be very, very difficult to overcome. If they were overcome, the energetic costs of firing sufficiently large projectiles at sufficient speeds ...

posted 4y ago by Starfish Prime‭  ·  last activity 4y ago by Starfish Prime‭

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Q&A Why do flying saucers have to spin while flying?

What L.Dutch said, plus whatever process is making the hull rotate is making it act like a turbine from a wind or hydro power plant. From a certain point of view, the whole outside of the ship is a...

posted 4y ago by Renan‭

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Q&A Why do flying saucers have to spin while flying?

Stabilization by gyroscopic effect, plain and simple. A gyroscope (from Ancient Greek γῦρος gûros, "circle" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientati...

posted 4y ago by L.Dutch - Reinstate Monica‭  ·  edited 4y ago by HDE 226868‭

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Q&A Could a Monotreme Griffin exist?

Be Flexible With What Counts as Wings Your griffons are four legged as the common depictions show, but rather than wings separate from the limbs instead there is a gliding membrane like that of a ...

posted 4y ago by NixonCranium‭

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Q&A Anatomically Correct Vanara

Reduced Jaw Muscle The brain of primates is slightly smaller than the brain of a human, which is thought to be the main reason for the intelligence gap between the species. The reasons why a monke...

posted 4y ago by Halfthawed‭  ·  last activity 4y ago by Halfthawed‭

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Q&A Why is transplanting a specific intact brain impossible if it is generally possible?

Paranoid Schizophrenia. The brain is malfunctioning, it perhaps contains a brilliant intelligence or valuable information, but the dopamine receptors respond abnormally. The artificial brain to w...

posted 4y ago by Mr Bumble‭

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Q&A Why is transplanting a specific intact brain impossible if it is generally possible?

It is an interface issue. Your technology has one step that converts the brain to computer data Reading out the personality and memories of a person from their brain requires that the brain is...

posted 4y ago by James Jenkins‭  ·  last activity 4y ago by James Jenkins‭

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Q&A Why would one hemisphere of a planet be very mountainous while the other is flat?

It turns out there's something very much like this, right next door to Earth. Observe the topography of Mars: (Image courtesy Wikipedia; larger version here.) The large blue areas in the northe...

posted 4y ago by Cadence‭

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Q&A How to make an animal which can only breed for a certain number of generations?

Tandem repeat mutation disease and genetic anticipation. Some genetic diseases occur earlier and earlier with each generation. Most of these diseases are caused by mutations in genes with tandem ...

posted 5y ago by Willk‭

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