What planets can humans live on?
The only planet we know of that humans can live on is Earth. The other planets have a few problems: -Mercury: Too hot on one side, too cold on the other. And no oxygen. -Venus: WAY too hot. -Mars: Very thin atmosphere with nowhere near enough oxygen; lots of radiation, temperature fluctuates a lot. -Jupiter: No solid surface, intense radiation, and storms/pressure which would crush any man-made structure. -Saturn, Uranus, Neptune: Same as Jupiter. Pluto (if you still think of it as a planet)- extremely cold and no atmosphere at all. There MAY be other planets out there we could live on, and scientists have considered the possibility of "Terraforming" planets to make them a bit like Earth. But terraforming would only work on some planets (only Mars and Venus would be suitable in our solar system) and we still aren't quite sure how to do it.
Will we ever colonize other planets?
As an aside, let me say first that few science fiction movies are made that don't underestimated the dates future events will occur. That's as much an intentional economic artifact as it is bad estimations. It's hard for most people to empathize with anything more than around one or two generations in the future, so even if the movie makers believe an event will happen 1000 years in the future, it's likely to be portrayed as closer to 100 years. Easy examples are 1984, and 2001: A Space Odyssey. Likewise, should anything close to Avatar ever unfold, it is likelier thousands or tens of thousands of years in the future. Assigning a close date to human colonization is pretty much impossible because of the number of variables involved, technological, anthropological, economic. Many of us who watched the Saturn Vs lift off for the moon (when I was your age) believed and hoped at the time that we would have a self-sustaining lunar colony by now. Of course, only 12 men have walked on the moon even 40 years later, so those hopes were wildly optimistic. So, are lunar and/or Martian colonies in our future, and will they happen in your lifetime? I hope the answer to both questions is 'yes', but I'm very doubtful about the second. I'd like to imagine a real self-sustaining Martian colony (i.e. not a sparsely-manned scientific research station) in 2060, but if I had to wager I'd go for a century longer at 2160 at least. And if we manage to screw up our low earth orbits with debris so badly they become unusable (see Kessler syndrome), all bets are off until that gets cleaned up--possibly that will involved a centuries-long setback. Technological advances such as nanotechnology will serve to make things easier, but as gintable said, travel time is something we can't do a lot about. It will likely be many millenia before we can hope for extrasolar colonization. All this assuming, of course, that nothing truly bad happens: a major world war, global economic collapse or other infrastructure breakdown, intentionalsabotagee of LEO space, just to name a few. I am glad there are young adults like you thinking about thelong termm future of humankind.
How soon can humans move to and live on Mars?
Will humans ever colonize Mars?It’s a tough question that NASA and other experts are racing to answer. They suggest our first trips might be two decades from now.There’s one man who’s crazy enough to say otherwise. His name is Elon Musk, and he’s shooting for 2024.Elon Musk burst onto the SpaceX stage last week and made a pretty bold declaration: humans will hit Mars by 2024. For those of us still adjusting to facial recognition, the idea of selfies on Mars might be a bit much to stomach.But Musk is certain the company will reach many launches a day with hundreds of passengers on board each time…a belief that puts SpaceX’s goal to reach the planet ahead of NASA and other countries’ space programs. Just a quick heads up before you pull up Yelp to check dinner reservations on Mars—a one-way trip will take three to six months and put a $200,000 dent in your wallet.As for Musk and SpaceX, the question still remains: how will they pay for it?That’s a great questionMuch of SpaceX’s current $16 billion valuation hinges on expected future revenue from launching nearly 4,000 satellites into space and offering better global internet access—the largest internet communication system right now has around 55 satellites.But to launch his mega-fleet of glorified TV dishes, Musk will need more than $1.3 billion in cash on hand. Better yet, he’ll need SpaceX to remain cash flow positive. And that’s easier said than done. The company has long promoted that it is “profitable and cash flow positive” on its website. With last September’s Falcon 9 mishap, the phrase was quickly removed.And finally……here’s something to think about while you sift through flight deals for your next Martian getaway. SpaceX projects annual revenue of ~$30 billion in 2024—the year it could take its first trip to Mars. But the cost of one trip could tally up to $4 billion for just four people…and Musk wants to bring hundreds…daily!It seems ludicrous, sure. But this is the same guy that disrupted the auto industry, is building an underground (and above-ground) network for supersonic transportation, and is reinventing solutions for solar energy.What’s colonizing a potentially uninhabitable planet in the next decade?If you’re all about following Musk’s next crazy idea, or you just love to know what’s going on in the business world. We’ll try to keep you up to date our free daily business newsletter, Morning Brew.
Will man ever be able to leave planet earth?
Biologic life support systems only need to be close enough as we can store excess oxygen or CO2 and release them when needed, also oxygen can be harvested from the silicon dioxide of the regolith on moons and asteroids, from the frozen water ammonia ice, from the CO2 of dry ice, all available on asteroids and comets. We can't launch the equipment and workers needed to build a large habitat but we can launch robots and perhaps a small habitat where a few people can be sheltered from the radiation and live in centrifugal gravity close enough to the robots to guide them in real time through telepresence. We won't be able to manufacture much at first but we could make wires, wires can make cables, cables can be knitted like yarn into the general shape of a large habitat, the holes in the knitted structure can be filled with regolith and either sintered or exothermic thermite welded with iron oxide and aluminum powders. Once the general structure is complete, the workers can work safely in the relative protection of the interior with gravity, nitrogen can be from the water ammonia ice commonly found on asteroids, comets and even some parts of the Moon, oxygen can be from the water, from the CO2 of dry ice ( again from comets ) or even from silicon dioxide. Power can be from the Sun or from liquid fluoride thorium reactors. We don't really need exotic technologies, we just need a reason to invest in the project. Changes in our mating practices would only be necessary for a stable population during an interstellar voyage but even then, a habitat could stop at an interstellar comet and construct a new habitat for a burgeoning population. There would be no reason to force changes in mating except for the use of frozen embryos and sperm on occasion to diversify the gene pool. We can avoid the small town effect by having the habitats in fleets thereby becoming communities within a larger city or nation like cluster of habitats.