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-2 votes

What is the color of flora on a superhabitable archipelago planet?

Probably the opposite color of the spectrum of the star, should plant-like vegetation evolve pigments ideal for the planet. We all know about chlorophyll but nothing else. Most of the sun's radiation ...
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0 votes

Galactic 'geographic' features, how could they impact galactic colonization efforts?

STL travel is limited to shielding concerns. Do the figures about how much heat you have to get rid of per square meter, punching through vacuum at 10% of c, with a typical gas density of 1 atom of H ...
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0 votes

Galactic 'geographic' features, how could they impact galactic colonization efforts?

Just yawning stretches of emptiness. Perhaps civilisations like ours in the spiral arms can only really hop along the arms. Travelling large void areas would just take too long. Perhaps all the ...
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5 votes

Galactic 'geographic' features, how could they impact galactic colonization efforts?

Flipping Black-holes. They normally have predictable rotation, an accretion disk that behaves in a nice orderly fashion and an ejection of x-rays and very fast ions in regular and expected directions ...
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5 votes
Accepted

Galactic 'geographic' features, how could they impact galactic colonization efforts?

That's a good start for space hazards. Even though humanity has only dipped our toes into space, we are still very concerned about radiation. Not only is there a cancer risk, but there as also a risk ...
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2 votes

Galactic 'geographic' features, how could they impact galactic colonization efforts?

Gravity and radiation might make them difficult to contend with, but who cares. Because if you're only moving to close stars you won't be getting anywhere near them. So they shouldn't be problems.
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0 votes

How much more mass does Mars need to have in order to still be habitable today?

Nobody Knows For one thing, mass alone is not a sufficient determiner of habitability. Composition also matters, and the minimum mass may be wildly different for different compositions (even if we ...
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1 vote

How much more mass does Mars need to have in order to still be habitable today?

Actually I recently ansered this question about inceasing the gravity of Mars: What are the effects of Increasing the gravity on Mars? One of many questions about the minimum mass of habitable planets ...
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5 votes

How much more mass does Mars need to have in order to still be habitable today?

It's not only a matter of mass... We know that Venus, with 0.815 Earth masses, has been capable of retaining an atmosphere, despite being closer to the Sun than Earth, and thus experiencing a more ...
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1 vote

Would it be possible to have 3 planets that could be colonised by humans in the same system?

I think gas giants in the habitable could potentially have quite a few moons with habitable conditions. Titan has a thicker atmosphere than earth, it is just far too cold for us because Saturn is so ...
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3 votes

Would it be possible to have 3 planets that could be colonised by humans in the same system?

One interesting way to fit more planets into a habitable zone is to have two planets in almost identical orbits that swap orbits with each other. Saturn's moons Epimetheus and Janus do this. They ...
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3 votes

Would it be possible to have 3 planets that could be colonised by humans in the same system?

If you want three rather hostile but still naturally habitable planets in your system, you might want to find out what the limits of planetary habitability for humans are, in order to create planets ...
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3 votes

Would it be possible to have 3 planets that could be colonised by humans in the same system?

I’ve been roughly basing it on the TRAPPIST-1 system, as it has 4 planets in the habitable zone, but I don’t know if there is a simpler way to have 3 habitable but different environments in relatively ...
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4 votes

Would it be possible to have 3 planets that could be colonised by humans in the same system?

Double planet though rare is a distinct possibility! even though the 2 planets move though the same habitable zone they need not, indeed probably do not, have the same climate or biosphere. This will ...
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1 vote

Would it be possible to have 3 planets that could be colonised by humans in the same system?

What you have set up here is definitely plausible! My only concern would be the challenges posed by living on a tidally locked planet, but it sounds like your civilization has the technology to make ...
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  • 179
3 votes

Would it be possible to have 3 planets that could be colonised by humans in the same system?

/different inhospitable but habitable (by genetically modified humans or humans using supportive technology) environments. ... if there is a simpler way to have 3 habitable but different environments ...
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15 votes

Would it be possible to have 3 planets that could be colonised by humans in the same system?

It's totally possible: already in our solar system the habitable zone, that is the region of space where the energy flow granted by the star is sufficient to keep water liquid, span between the orbits ...
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