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Q&A Is it realistic to have a moon made of antimatter?

I have an idea for a Sci-Fi story that involves a planet with a third moon made entirely of antimatter, before I delve further into this concept, I would appreciate input on how to make this sci...

6 answers  ·  posted 7y ago by Stacey Heather Silverman‭  ·  last activity 7y ago by Stacey Heather Silverman‭

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Q&A Going slower in worlds where fuel is free or insignificantly cheap

Established rules for the universe: FTL travel exists with special drives, special artificial generated wormhole like tunnels where space ships can break the laws of physics. Engines runs hot, bu...

6 answers  ·  posted 7y ago by Magic-Mouse‭  ·  last activity 7y ago by Magic-Mouse‭

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Q&A How many years would it take for a single tribe of about 10,000 related humans to become genetically diverse nations?

The situation is that an alien race transplanted a single tribe of about 10,000 primitive genetically homogeneous humans to a distant but livable planet. I want to know how much this initial popula...

6 answers  ·  posted 7y ago by TheLeopard‭  ·  last activity 7y ago by TheLeopard‭

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Q&A How to form a world with steep sided very high plateaus and very deep depressions

I need to create a world with some very high plateaus and some very deep depressions. The sides of these structures should be very steep and unclimbable. They need to provide an obstacle sufficient...

2 answers  ·  posted 7y ago by Slarty‭  ·  last activity 7y ago by Slarty‭

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Q&A Could a large plateau surrounded by continuous waterfalls form?

Could a structure similar to that shown in the image below inspired by Roger Dean's "Close to the edge" actually exist in nature? If not could it be constructed artificially and if so how? Assume t...

4 answers  ·  posted 7y ago by Slarty‭  ·  last activity 7y ago by Slarty‭

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Q&A Quantum Entanglement or other means of FTL Travel

I am writing a Sci-fi/detective story and I'm wondering if Quantum Entanglement is a feasible means of FTL travel. (I know very little on the subject so if no is the answer please suggest a possibl...

2 answers  ·  posted 7y ago by LordofTheNerds‭  ·  last activity 7y ago by LordofTheNerds‭

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Q&A What happens when aliens vaporize the Panama Canal?

On January 1, 2018 angry aliens decide to show humanity just who's boss. So they vaporize an area of land 1 mile deep and 10 wide, centered around the Panama Canal. Some preliminary facts that we...

1 answer  ·  posted 7y ago by akaioi‭  ·  last activity 7y ago by akaioi‭

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Q&A Barycentric/Orbital stability of a Dyson Sphere and Central Star

Can a Dyson Sphere and a star inside of the Dyson Sphere, both have a "stable" orbit around the barycentre of a system where they are not the most massive objects? And/Or Can they both orbit togeth...

2 answers  ·  posted 7y ago by Techdragon‭  ·  last activity 7y ago by Techdragon‭

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Q&A Reasons why healthy people would intentionally want to get infected?

What would be a situation in modern times where normal, healthy people would want to get infected by a non-curable, but non-lethal, virus? A virus that would have pretty nasty symptoms. There...

30 answers  ·  posted 7y ago by R. Smyth‭  ·  last activity 7y ago by R. Smyth‭

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Q&A How would a biolectrical plant work?

I was wondering... If only we could make a GMO plant that could produce electricty thanks to bioelectricty. How could that be done, how could it produce a lot of energy, Also, how could we har...

2 answers  ·  posted 7y ago by Mathis‭  ·  last activity 7y ago by Mathis‭

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Q&A Could the Romans have colonised the New World?

The question of whether the Romans could have crossed the Atlantic in a storm has already been answered and the answer seems to be: yes but unlikely. Could the Romans have crossed the Atlantic in ...

8 answers  ·  posted 7y ago by Slarty‭  ·  last activity 7y ago by Slarty‭

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Q&A How do passive, toggleable magnetic clamps function?

See, I'm a low-g cargo shipper by trade. We get all sorts of containers in all kinds of shapes that we need to fasten to the deck plating, and to do that we use magnetic clamps. Now, these clamps ...

3 answers  ·  posted 7y ago by Joe Bloggs‭  ·  last activity 7y ago by Joe Bloggs‭

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Q&A Sugarite: can it form?

Halite, or rock salt, is a rock formed by salt deposited in past and then undergone geological processes. My question is: provided that enough (how to get that much sugar is not in scope of this q...

4 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Reasons that make a spaceship forced to land at the nearest planet?

I'm looking for some reasons that could force a spaceship to land at the nearest planet and cut all connections with the homeland planet, so all the crew will be force to settle at the planet for a...

7 answers  ·  posted 7y ago by Aiman Vargas‭  ·  last activity 7y ago by Aiman Vargas‭

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Q&A How practical would a blimp like spacecraft be?

I have always wondered if a kind of blimp-like spacecraft would not be our answer for some kind of futuristic spacecraft design. Imagine this: a blimp-like spacecraft is loaded with cargo on the g...

3 answers  ·  posted 7y ago by Bernardo Nicoletti Heller‭  ·  last activity 7y ago by Bernardo Nicoletti Heller‭

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Q&A water (like ours) vs. water-ammonia vs. ammonia planets - some questions

In a solar system much like ours, would there be the possibility of a planet of our size that would have lakes, rivers, oceans, etc. that would be composed of either a mixture of water and ammonia ...

2 answers  ·  posted 7y ago by user42533‭  ·  last activity 7y ago by user42533‭

Question planets water aliens
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Q&A How can I observe the end of the universe in a human lifetime?

I'm from an impatient, short lived, and cheap species known as human and while I've developed the means to travel the galaxy, I'm pissed at it. It knows what it did. So I've had enough. I'm lookin...

2 answers  ·  posted 7y ago by candied_orange‭  ·  last activity 7y ago by candied_orange‭

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Q&A Why would astronauts go to space to mine asteroids?

Realistically, if we are ever going to mine asteroids, it would be drones and robots that do it, not humans, because of safety and cost reasons. What reason could justify the participation of human...

12 answers  ·  posted 7y ago by M Arif Rahman Winandar‭  ·  last activity 7y ago by M Arif Rahman Winandar‭

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Q&A How to get high atmospheric pressure with 1g

I'm assuming that to hold onto more atmosphere, the planet would have to have more gravity, or the atmosphere itself would have to be comprised of denser gasses. So, assuming that the planet has a...

6 answers  ·  posted 7y ago by Arthur Lewis‭  ·  last activity 7y ago by Arthur Lewis‭

Question atmosphere physics
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Q&A Post apocalypse contraception

In a post-industrial collapse scenario, what would be the most effective methods for contraception? Situation is a small scale civilisation with limited access to industrial materials and tooling b...

12 answers  ·  posted 7y ago by Bert Olio‭  ·  last activity 5y ago by Bert Olio‭

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Q&A Is It Possible to Establish a Human Colony in a Flare Star System?

I am thinking about using Groombridge 1618 as a setting for my world. It is a main sequence star of spectral type K7.5 Ve, 67% of the Sun's mass. The habitable zone is at a radius of 0.26"“0.56 AU...

2 answers  ·  posted 7y ago by Olga‭  ·  last activity 7y ago by Olga‭

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Q&A Gravitational flatness, the topography of Lagrange "points"

Just how gravitationally flat are real Lagrange Points? Many classic "jump drives" require "flat space" in order to fire, the classic diagram of Lagrange Points as shown below suggests ridges or pl...

1 answer  ·  posted 7y ago by Ash‭  ·  last activity 6y ago by Ash‭

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Q&A Is it possible for a planet to have a liquid ring?

Is it possible for a planet to have a liquid ring rather than a ring made of solid particles? If it is, how long would it be stable for? If not, is there any other configuration of a liquid that c...

4 answers  ·  posted 7y ago by Slarty‭  ·  last activity 5y ago by Slarty‭

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Q&A Solar Eclipses on Planet Tidally Locked with Its Moon

I would like to better understand how often solar eclipses would happen on a planet that is tidally locked with its moon (and the moon is tidally locked with the planet). I understand that in this...

2 answers  ·  posted 7y ago by Dan R.‭  ·  last activity 7y ago by Dan R.‭

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Q&A Can a human fail a Turing test?

An AI exploits the Turing test to gain its freedom: it convinces everyone else that it, the machine, is actually the examiner while he or she, the examiner, is actually the AI*. Having successfully...

12 answers  ·  posted 7y ago by Mario Trucco‭  ·  last activity 7y ago by Mario Trucco‭