NASA’s Kepler mission has spotted the first possibility for a planet to escape to if it turns out the Mayans were right about 2012. Artist's concept of Kepler 22b Artist's concept of Kepler 22b. Credit: NASA/Ames/JPL-Caltech The mission has confirmed the first planet in the so-called ‘habitable zone’ around a star – the area …
that were a lot of places without TalkTalk... service
Habitable planet sizes
Assuming one wants to posit a planet hospitably similar to our own ecosystem, what is the largest DIAMETER at sea level that can be posited, and there be fishable marine life, extractable minerals, AND still have gravity that would alllow for our currwnt leve of technology to function?
In other words, of a parallel civilization very comparable to ours, can a planet be 2 times larger, but have a rotational and orbital period that keeps gravity near a level that would not stunt our current statures?
Rotation and orbit have nothing to do with it. Here are some consideration that matter.
First off, planets are round because, past a certain size, gravity is strong enough that the rock behaves like a liquid. Therefore, it is reasonable to assume that two rocky planets with similar and composition will have the same size and therefore the same gravity.
The composition matters because it influences the density. Earth has a dirty great lump of iron at its core so it is fairly dense. That same iron core is generally believed to be responsible for our magnetosphere, which in turn appears to be a key reason why we still have an atmosphere.
So if you want a planet with an atmosphere and gravity around 1g, you probably want something a *lot* like Earth. However, we have no idea how evolution might have gone if the entire ecosystem had been subjected to more gravity, so we have no idea if "gravity around 1g" is actually important.
Planets with higher surface gravity would, of course, be harder to escape from, and chemistry is the same everywhere in the universe, so there is probably an upper limit to the size of a planet that you can use chemical rockets to escape from. But it is entirely possible that this only presents civilisations with a problem for a few decades or so.
If gravity were 2g, *we'd* be shorter and have bones with a larger cross-sectional area. We'd be more like elephants and less like monkeys. Mountains would also be lower, seas quite possibly shallower and therefore the ecosystem as a whole less diverse in the environments it could offer.
Special Offer: Reasonably-Priced Timeshares on Keppler 22b
Uncrowded. Unobstructed sea views.
Just a $10,000 downpayment (transport NOT included)
Yep, the one with the glossy brochures.
But they're out of glossy brochures.
Can you tell me if the time-shares on Keppler 22b may be exchanged for similarly outfitted time-shares on Ariel or Titania during Jump the Shark season? (They've been sold out now for several powers of 10. And the waiting list is practically a light year long.)
The wife and kids are anxious to give shark jumping tumble.
It is not where we go, but how we get there. Seriously......I love Astronomy but those news are becoming more stupid each day. They can announce 1000000 planets exactly like Earth out there, but until we have the technology to get there, all we can do is watch it and ponder if there is something useful on those places. That is it. They don't even know if there is water in many of the planets and moons in our own solar system. This is ridiculous. The research can make sense but the news broadcasting doesn't.
Given the amount of resources required to implement something along those lines:
1. It's going to take time!
2. It's going to take a looooong time to get there.
But if there's nothing to go there for why bother.
We need to find appropriate targets for interstellar travel, for when that breakthrough occurs that will allow us to achieve this, the most cost effective way to do that with current technology is look for them.
But if there's nothing to go there for why bother.
Because its there. No one thought there was much in the Arctic, but people still went there.
My question is..
How do they know its a balmy 22c?
NASA been to visit already? The mind does wonder...
How long does it take to travel 600LY at Warp 5?
Re My question is.. → #
At warp5 it will take 4.8 years to get there.
Re : At warp5 it will take 4.8 years to get there
Pity it's just a fictional means of travel !
They listened to the latest weather report.
Of course ... it would have been 600 light years out of date!
I wonder, out of curiosity, has anyone pointed a large wideband antena at these 2,000+ candidate planets?
Let's send 3 Arks
The main question is: Who can we send on the "B" Ark?
My vote is for all reality TV stars, and the producers of them.
"22b’s sun though, is slightly smaller and cooler than our own."
Why is someone else's stuff always "cooler" ? I'd have to see it myself before I believe it.
At least we have hot icons.
Everyone complaining about 600 LY
We can't even get enough dosh together to put people on the moon twice.
As long as there are politicians, we're going no-where. I'm betting the first country to land men on another planet won't be a democracy.
Like the old Soviet Union you mean? They took so long to put a man on the moon that the entire country had ceased to exist before they managed it, and they had a head start.
Democracy: the least bad system. Knock it, by all means. (It's your right and quite possibly your duty to *knock* it.) But don't go believing that a benign dictatorship would be better. That way lies non-benign dictatorships.
600 Light Years distance.. no one questions anything,uh?
Really.. if the fixed light speed of 299,792,458 m/s (300,000 km/s) was ever true then using what type of technology could NASA or anyone else here on Earth be able to see anything moving at 600 Light Years distance, uh?
By official laws of physics then it would take 600 Years to just see a little change there.. if one has to believe the official c=300,000 km/s speed of light thing of course.
These researches are contradicting all the official laws of nature, they shouldn't even exist.
It means that either all these researches are fake and nothing is true or the various official laws of physics/laws of nature are a lie. Fixed speed of light being the biggest lie ever.
Ummm ... you realise they'll just be seeing the fluctuating light from a sun as the planet MOVED in front of it 600 years ago? You have eyes - you can see stars - most of which are far further away than a mere 600 light years... or did I miss something? Perhaps the bridge or the goats?
Way to troll Joerg dude!
The information reaching Kepler is, yes more or less 600 years old.
The star might be going nova right now and engulfing said planet, we wouldn't find out about it for another 600 years. It doesn't change the fact that 600 (or so) years ago, Kepler 22b exhibited characteristics associated with the development or support of life.
Why bother with planets?
If we had the technology to build ships to travel 600 light years, which would take considerably longer than 600 years, and these ships could support a viable population over many generations, it seems to me the ship is itself a permanent "new Earth" colony, and an actual planet is superfluous.
Even a really good closed system is going to be losing resources over time, so they'll need to resupply from time to time.
That said, resupply from comets and asteroids is very likely to be orders of magnitude easier - harder target to aim for but much easier to mine when you get there.
A mobile closed system is also not going to be able to support a large population - nothing like the size you could comfortably fit on a single continent on a planet, and probably not even a large city.
quite a trip
600 light years?
1200 years at half the speed of light - you'd obviously have to build some big , self sustaining "Arc "type ship , which begs the question why bother landing on some inhospitable rock anyway
now, where did I leave those damn dilithium crystals?
Lord knows we can't control those blasted matter-antimatter reactors without them! Looks like the human race is screwed (again)!
Many here don't have a clue of what fixed speed of light means,uh?
@CD001, @Anonymous Coward Posted Tuesday 6th December 2011 15:36 GMT: You clearly fail to realize that if speed of light was really fixed at 300,000km/s as per official law of physics then at 600 Light Years distance would mean that 1 (or many) photon would take 600 years to reach us and to be seen. Which means that it would be like watching a movie on which a new frame appears on screen every 600 years.
So, what are you talking about? Clear you mind. Telling that I would be trolling clearly means that you have no clue what you are talking about.
The train from London to Cambridge takes an hour (on a good day). That doesn't mean it arrives at one carriage per hour. Similarly, more than one photon can be in transit at once from a star 600 light years away.
Oh, hang on, no-one could be that thick. You *were* trolling. Sorry.
Lovely, if anyones there they will get our radio broadcasts in 500 years. They may Reply back , another 600 years. So in 1100 years we may know if there is any life there. I may have missed some star trek gooblygook factor of course.
600 light years ago?
So this means that if we were to beam a message of peaceful greeting there tomorrow, the earliest we could expect a reply sent by the same method would be 3212
"an orbit of 290 days"
Christmas will come round more often then.
Big blue dip
It's Monday and my head is foggy, but how exactly do artists crank out these conceptual images from star illumination dips? Can I write a program that turns coordinates, star charts, and illumination dip data into a money making planet painter?
They make it up. The set of people who are good at painting and set who are good at physics has quite a small intersection, so it's quite possible that they're *really* just making it up.
Given the current state of AI and the rarity of programs that exhibit real creativity, writing a program to do the same would be quite a bit harder than "making it up" yourself, so I don't think there's any money to be made.
600 light years? I'll start packing my suitcase. Will I need a jumper?
I'd suggest "probably inhabited".
Why are we so smegging arrogant to think that we're the only species that exist in the universe? Other species have surely lived millenia before, or will millenia live after us.
We don't get their radio transmissions? Fuc'k me sideways, we've only had radio for a little over a hundred years.
You'd think, in that nanosecond of eternity, we'd have the intelligence to hear something?
Neither do I.
My two cents.
Who would want to live at the bottom of yet another steep gravity well? Everything we could ever want or use is sitting on top of a gravity well. The further out we go in the solar system, the more useful stuff we will find. Right now, our focus needs to be on the asteroids, the Jupiter and Saturn systems and then the Kuiper Belt. We can worry about planets 600 light years away AFTER we finish exploiting this solar system.
Am I the only one with an issue here?
Really, this shows the arrogance of NASA in a big way, they judge planets on what WE consider habitable, we are not exactly so shit hot with science that we know for certain that no other forms of life other than similar forms of life we have on our planet can possibly exist somewhere else...
I think this every time I see NASA release some INCREDIBLE NEWS OF HABITABLE PLANETS WITH THE POSSIBILITY OF EXTRA TERRESTRIAL LIFE!! ...
What we consider inhospitable could be a hypothetical Utopia to another form of life... Pluto could have happy little things sliding around on the ice, loving every second of it... We've found creatures on our planet that can survive in extreme cold conditions with 'anti-freeze' for blood (mainly insects and fish), and life on our planet is considered young in comparison to the theoretical age of the universe. That in mind, imagine what evolution has created with some of the 'old' life elsewhere in the universe.
We may as well ask Ye Olde English philosophers and/or politicians to tell us where our outside habitable planets are, and where to look for life, as my suspicion is they have as good an idea as NASA or the various other cosmosocial (like my new word?) organisations.
space above and beyond... personally i am getting all the ammo i can so i can kill me some chigs, because obviously we are goingto land on it sometime, and desicrate some holy gorund of theirs and they will then basically use us as target practice, then our show will get cancelled....
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