7 Earth-Size Planets Found by NASA

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ssu
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Re: 7 Earth-Size Planets Found by NASA

Post by ssu » Fri Feb 24, 2017 2:19 am

Montegriffo wrote:But you have to prove that none of these developments would have happened without manned space flight which is a whole different matter. Many of them were developed independently because there is a need for them here on Earth. Some of the best solar panels currently available come from Norway which as far as I know didn't have to put a man in space to achieve that. These lists on their own are not enough to convince me that a trip to Mars is going to benefit mankind enough that it is worth the expense.
Why space programs and military research programs, btw, do tend to be important is that they simply are in fields where ordinary R & D wouldn't venture out to. Space is a quite extreme environment and you wouldn't start with those kinds of requirements at the first place on Earth. And during the Cold War, anything that even remotely might give an edge to Russia was deemed important to study by the military. Similar interest wouldn't happen if there wouldn't be a space program (or a Cold war arms race). This is why a space program is beneficial: it requires a lot of fields with a lot of high-tech.

What is provable basically is that serious spending in R & D works and is very important for future economic growth. Period. And if the government isn't involved, then the Private sector simply cannot pick it up. Private R & D cannot fill in the role as it has to pay itself up basically immediately: they cannot put money into something that might have economic benefits later which nobody can yet predict. The other thing here is basic research, not applied development for some product. The simply fact is that actually both NASA and the military in general (in the US) has supported a lot of basic research, which no universities could sponsor on their own. Only some large corporations like a Google etc. can even put money into basic research, but those are the exceptions.

I'll give an example from my country of what happens when R & D at the government level is cut.

Before the local National Institute for Health did a lot of medical research and basically had large laboratories where they could By themselves handle medical samples. Then someone had the bright idea that this was a useless waste of money, not what the institute should do, that the universities could do the research, the Private sector the laboratory stuff (checking samples etc). End result: as the universities didn't naturally get any increased spending, the medical research simply stopped. As there was no Private sector companies to do the laboratory stuff so well, now Finland is shipping it's health sample's to be checked in Poland. Basically the present NIH is a bureacracy that generates paper and recommendations and has no contact to medical research, where it was world class at least in some areas earlier.

Now naturally there is inefficiency in government run departments. And the politics, that everything has to be spread around to every place because of pork barrell politics (and not have everything concentrated in one place). Yet nothing is simply good or bad and especially shouldn't be looked from some ideological perspective.

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Otern
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Re: 7 Earth-Size Planets Found by NASA

Post by Otern » Fri Feb 24, 2017 5:22 am

At some point in the future, we will explore other solar systems. Either out of necessity, or out of scientific research. But before that point, we'll need to colonize other planets and moons in our own system.

And we'd need to develop planet killer weapons before venturing out in other systems, and we should be really careful to send signals out where some other intelligent species might pick them up.

I don't really like the idea of sending signals and technology all over the universe proclaiming our presence here. If there's life on other planets, it'll most likely be single cell. But some might have multiple cells. And some of those could have evolved into plants and animals. And some, very few of those could have evolved intelligent life, and be either a little smarter than us, or a little dumber. If we find it, I really hope we don't try to contact them, or do anything stupid like show them where we are. Either hide, and hope they'll never find us, or nuke them from orbit so hard their entire species goes extinct.

Because if there's intelligent life somewhere. Some of those intelligent life forms will have gotten to their point in the same way as humans. By conquering other, lesser life forms. They'll know aggression, they'll know war, and they'll know the only threat to them at some point of technological advancement will be other intelligent life forms. Perfected star travel will get rid of any energy and resource deficiency. And we could just hop from one star system to another as our star dies. But the one threat left would be other people doing the same. And sure, they wouldn't have the need to exterminate us. And we wouldn't have a need to exterminate them. But when the only threat left to us is their existence, no matter how minute this threat is, our incentive to remove this threat will be far greater than anything else. And it would be the same for them.

So, develop some relativistic weapons, or at the very least construct some hydrogen bomb on Pluto capable of removing Jupiter before announcing our presence to the galaxy.

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Re: 7 Earth-Size Planets Found by NASA

Post by Penner » Fri Feb 24, 2017 6:30 am

Okeefenokee wrote:
Calculus Man wrote:Has Neil deGrasse Tyson ever had a good idea? Serious question, because every time someone quotes him, I wonder why the hell he has a platform. All of his ideas seem to stink.
Shhhhh. Don't say that about the anointed one.

Rather than contribute to real science, he became a celebrity.

One of us. One of us. One of us.
He isn't the "anointed one" in any circle, IMHO. He just has a small cult following because he has appeared to the masses through TV and movies and not only has a Twitter account but uses it.
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Re: 7 Earth-Size Planets Found by NASA

Post by Lucky1936 » Fri Feb 24, 2017 11:32 pm

Seems to me Niel Degrasse Tyson isn't very consistent about how difficult he figures interstellar travel is. At one point in the JRE podcast he's explaining how quick it could be to get to the star with all the planets like it's no big deal, but later on he says that colonizing mars is so difficult that doing ANYTHING else is easier and more worthwhile. I like Mr Tyson because he's a scientist who is also a good explainer, but I often wish he'd get just a bit more technical about what he's explaining.

This story has been somewhat overblown in terms of 'there might be life on these planets', and that's understandable. There's a good chance any water on these planets got burnt up and blown into space when the star was bigger than it is now (i.e. before it was a red dwarf). Also, they are probably tidally locked to the sun, so one side of the planets will be sweltering, and the other freezing, not exactly conducive to life forming. I haven't found anything about whether these planets even have atmospheres or not.

On a related note, everyone seems to assume that Mars is the planet that would be easier to colonize, even though it has a number of critical flaws to colonization (i.e. no magnetic field and far less gravity). Venus is the other option, and is more like Earth in a lot of critical ways, even though in it's current state it's definitely no good to us. I was watching a documentary a long time ago about the planets, and pretty much the only difference between Earth and Venus is that Earth developed life, which in turn created the atmosphere that we all depend on. This made me wonder if it would be possible to bioengineer some sort of extremophile that would be able to survive on Venus. If this engineered life form could photosynthesize, maybe we could plant a bunch of them on Venus and after a few million years the atmosphere clears up? Maybe someones already working on that very idea.
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Re: 7 Earth-Size Planets Found by NASA

Post by Smitty-48 » Fri Feb 24, 2017 11:49 pm

The solution for Venus is to colonize the sky, the atmopshere at 50 miles above the surface of Venus is the most Earth like, solar induced magnetospehere for radiation levels similar to Earth, gravity is Earth like, temperature at high altitude is 81F, pressure is like Earth at sea level, Cloud City on Venus is actually more viable than a Martian Tatooine.

Mars is a dead end, too much radiation, too little gravity, atmosphere is too thin, prolonged exposure to Mars is not going to be viable.

The closest Earth like planet is Venus, not Mars, Mars is not like Earth, Mars is like the Moon.

The kicker with Venus is that breathable air; oxygen-nitrogen mix, acts as a lifting gas in the Venutian atmosphere, so the same gas you breath, also floats the Cloud City.
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Re: 7 Earth-Size Planets Found by NASA

Post by katarn » Sat Feb 25, 2017 2:17 pm

Lucky1936 wrote:Seems to me Niel Degrasse Tyson isn't very consistent about how difficult he figures interstellar travel is. At one point in the JRE podcast he's explaining how quick it could be to get to the star with all the planets like it's no big deal, but later on he says that colonizing mars is so difficult that doing ANYTHING else is easier and more worthwhile. I like Mr Tyson because he's a scientist who is also a good explainer, but I often wish he'd get just a bit more technical about what he's explaining.

This story has been somewhat overblown in terms of 'there might be life on these planets', and that's understandable. There's a good chance any water on these planets got burnt up and blown into space when the star was bigger than it is now (i.e. before it was a red dwarf). Also, they are probably tidally locked to the sun, so one side of the planets will be sweltering, and the other freezing, not exactly conducive to life forming. I haven't found anything about whether these planets even have atmospheres or not.

On a related note, everyone seems to assume that Mars is the planet that would be easier to colonize, even though it has a number of critical flaws to colonization (i.e. no magnetic field and far less gravity). Venus is the other option, and is more like Earth in a lot of critical ways, even though in it's current state it's definitely no good to us. I was watching a documentary a long time ago about the planets, and pretty much the only difference between Earth and Venus is that Earth developed life, which in turn created the atmosphere that we all depend on. This made me wonder if it would be possible to bioengineer some sort of extremophile that would be able to survive on Venus. If this engineered life form could photosynthesize, maybe we could plant a bunch of them on Venus and after a few million years the atmosphere clears up? Maybe someones already working on that very idea.
Those probably do exist already. Since most people still go on about Mars, I heard a terraforming idea pitched that said some of the extremophiles near geothermal spots like Yellowstone could be quickly adapted and sent to Mars to create a breathable atmosphere. It'a a pretty impractical idea because of the time and gains involved, but interesting.
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Re: 7 Earth-Size Planets Found by NASA

Post by Speaker to Animals » Sat Feb 25, 2017 2:20 pm

He's not an engineer. The people who know how to do this stuff were pushed out of power by planetary scientists just like this guy in the 1980s.

This is why NASA became such an ineffectual dumpster fire that we had to create a second space program run by the USAF and private companies emerged to do actual space colonization work.

His interest lies in getting as much funding for his science projects as possible. Once you realize that, you can take some of his advice with a grain of salt. These guys have been trying to stop space colonization since for decades now. Mars colonization would take money away from their science projects, which means their guys are out of a job.
Last edited by Speaker to Animals on Sat Feb 25, 2017 2:23 pm, edited 2 times in total.

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Re: 7 Earth-Size Planets Found by NASA

Post by Okeefenokee » Sat Feb 25, 2017 2:20 pm

I don't think you can do anything that will last without getting the core going.

No core: no magnetic shield, cancer city, solar winds remove atmosphere.
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Re: 7 Earth-Size Planets Found by NASA

Post by Speaker to Animals » Sat Feb 25, 2017 2:28 pm

Okeefenokee wrote:I don't think you can do anything that will last without getting the core going.

No core: no magnetic shield, cancer city, solar winds remove atmosphere.

I can think of some good reasons to want to colonize it.

It's very low gravity, but enough gravity to make building structures not terribly difficult. Yet with the low gravity, the cost of launching produced goods into orbit is very small compared to launching goods into orbit from Earth.

Fire hazard on Mars is pretty low. Because you are not surrounded by vacuum, you could more easily escape a structure experiencing a fire and move to another shelter. Doing that in space or on the lunar surface would be much more dangerous. And because there is so little oxygen in Mars' atmosphere, the external fire hazard is quite low. This could minimize risk inherent in refining mined metals while still capitalizing on smaller gravity wells' reduction in overall costs.

I agree that trying to make Mars into anything but an industrial colony would be silly, because I don't see how we would reasonably create a magnetosphere anytime soon. For most of space colonization, I think we are better off building the habitats in space itself as a byproduct of mining asteroids.

edit:

It also is much easier (and cheaper) to rendezvous with a planet than some refinery in solar orbit. Mars is a good size to do this cheaply while still being able to burn down the Sun's gravity well to get back to Earth economically.

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Re: 7 Earth-Size Planets Found by NASA

Post by Okeefenokee » Sat Feb 25, 2017 2:42 pm

I didn't think it was even possible, but a little looking around produced a handful of theories.

The prospect of restarting the core sounds like science fiction, but there are people who say it's really possible.
  • There are some very good ideas. This requires a multiple answer approach. This can not be resolved by one method only. I don't believe mass is the issue (if) the iron core is large enough in comparison to the over all mass of the planet. If that is the case then re-starting the mantel is within our current technology to do. We may be able to reach and initiate colonizing the planet within a decade but this would be no more then a .001% colony till we transform the planet. Hence it will take decades to do and if we don't start now then we are only delaying the inevitable. I propose the following, a combination of the proposed ideas.

    1.Go to the asteroid belt and grab a few good sized rocks. Toss them at Mars so that they impact at a tangent. Not only does this increase the green house gasses and increase the atmospheric temperature, but it also gently starts to increase the rotation of the planet. Several of these impact placed and timed correctly can do the above.
    2.A series of properly placed nuclear shape charges planted into the mantel to assist in the melting process. Not enough to cause any long lasting side effects. Just enough for part 3 to work.
    3.While grabbing rocks we build a new moon for Mars. Placing this in orbit to increase and stabilize the tidal forces on Mars. this will help heat the core and keep it molten. It will take some artificial stabilization to keep the new moon in orbit till gravity and tidal forces straighten enough to hold it in place.
    4.All of this still may not be enough to hold back the solar winds. so an artificial shield to strengthen the now occurring magnetic shielding maybe needed.

    http://space.stackexchange.com/question ... etic-field
GrumpyCatFace wrote:Dumb slut partied too hard and woke up in a weird house. Ran out the door, weeping for her failed life choices, concerned townsfolk notes her appearance and alerted the fuzz.

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