I have to create a planet habitable for the survival of human life?

There is a science competition and we have to give details for a planet that has a possibility of sustaining human life. I am a bit confused as to what should I include. There is so much - Orbits and rotation, atmosphere, crust mantle and core, soil type, biodiversity, water, plants, food, metals, magnetism, gravitational force...

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roogie5 years ago
Framistan is wrong for several reasons. I am an astrophysicist researching planetary habitability so you know my background. I also do believe in God, but I also think that God made an amazing universe which is able to have life evolve in many extreme environments like we see on Earth. And I see no reason why life could not evolve on other planets.

90% of stars are actually smaller than the Sun, not larger. They can have habitable planets orbiting them. It is completely unclear if having a jupiter planet helps or hurts a planet since while they take in a lot of asteroid impacts, Jupiter also sends a lot of asteroids our way. There is absolutely no reason to limit the star type to G2, I don't know where he got that. Any FGK star would be fine for complex life. And M stars are certainly ok for microbial life and possibly even complex life. For complex life, you might need oxygen, as it gives the most about of redox energy enabling multicellular life, however, there does exist a counter example on Earth of a multicellular life form which does not need oxygen. There is no need for a certain land & water ratio. As long as you have at least 10% water, you would have a planet with biogeochemical and hydrological cycles just like ours. Plate tectonics and a magnetic field are probably helpful, but these should be common on planets that are Earth-sized or bigger. Having a large moon has been interesting for our planet, and has taken some asteroid impacts, but it is not necessary for complex life to evolve. It is estimated, from Kepler actually, that there are millions of habitable planets in our Galaxy alone, and there are billions of Galaxies. The chance that life didn't originate somewhere else is almost zero.

Basically for your planet, I would choose a star that is either an F, G or K star. Check out Nancy Kiang's scientific american article about how the color of plants would be different around different stars. Really interesting. I'd have it be Earth-sized or bigger. It could be a moon around a Jupiter-sized planet in the habitable zone, like Avatar. It could have several moons. Or it has been shown that it could orbit 2 stars and be habitable. So that is interesting. As far as we know, life needs water, so I'd have it at least have some percentage of water.

framistan5 years ago
When Earth was found to be NOT the center of our solar system, science mistakenly concluded there is nothing special about our planet. But, recent discoveries within the last 30 years are leading many astronomers to say the universe can't be explained by random chance. There are many NARROW circumstances that allow us to exist, such as the strong nuclear force. If it were slightly stronger or weaker, then chemistry wouldn't work. Here is a list of several other mathematical constants that must be finely tuned for our universe to exist : Electron Mass Proton Mass Atomic Mass
Strong Nuclear Force Speed of Light The Cosmological Constant
Gravitational Force Mass Of The Universe Electromagnetic Force
Weak Nuclear Force Boltzman's Constant Carson Energy Resonance In addition to those MATHEMATICAL circumstances, there are also many COSMO- LOGICAL circumstances that must ALL occur precisely in order to have a living planet such as ours. The list is about 20 items long, here are just some of them: Nearly Circular Orbit ---- Protected By Gas Giant Planets ---- Orbiting A Main-Sequence G2 Dwarf Star --- Within the Circumstellar Habitable Zone ---- Oxygen & Nitrogen Atmosphere ---- Planetary Mass --- Has Magnetic Field ---- Has PlateTectonics --Moderate Rotation --- Ratio of Water & Land--- Orbited By Large Moon. If our MOON did not exist, neither would we. ALL of the above listed items must be in place for earth to exist. Some would say, "There are BILLIONS of stars, so there must be many thousands of earths." But Just ONE of the above listed items wipes out
90 percent of them. 90 percent of the stars are too large to have a habitable planet orbiting it. The Earth is undeniably SPECIAL. ................ ..............................Therefore, you only need ONE item to make your planet habitable by human life. That item is God.
The fact we're here means that the conditions we find are the right ones to exist, or we wouldn't.

There is no "fact " that 90% of stars are too large to have habitable planets orbiting them, there are only the current observations that only allow us to "see" planets orbiting big stars. Big difference.
Kiteman5 years ago
For human habitation, focus first on the presence of liquid water, which is a fine balance between solar output, orbital radius and planetary gravity.

After that, much of what you choose is down to creativity.
ayusha1081 (author)  Kiteman5 years ago
And what about the presence of oxygen, and the wildlife/plantlife? Won't that effect the survival of Humans?
I said "first". You can't have free oxygen without extensive plantlife, you can't have extensive plantlife without liquid water.

You said this is a competition, so if we do all the work for you, we are going to expect to get the credit and the prize.

Take a look at the Biosphere 2 experiment. and go on from there.
Vyger5 years ago
Can I buy a small continent? I would be interested in making a little investment that might pay off in few hundred thousand years.

That's actually the biggest thing you need, lots of time, time to allow things to sort themselves out and reach a sort of equilibrium. And time for toxic stuff to get dispersed, atmosphere levels of gasses to stabilize. Lots of time ---
rickharris5 years ago
I think your best doing te research yourself.

Wikipedia will be a good place to start BUT not the only place.

Start with the keywords you have established.
lemonie5 years ago
Read up on this planet and start from there.