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One thousand exoplanets but still no twin for Earth

exoplanets life aliens earth twin nasa esa atmosphere echo kepler

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#16 arachnoid

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Posted 22 October 2013 - 20:24

Go to a beech and grab a hand full of sand then look very closely and see how many specs there are and just how many totally different types your hand contains.Some are organic others are purely mineral yet they were all created oblivious to each others presence and yet they still coexist in the same environment.Our little planet could be at one end of the beech and our twin right over the other side of the rock pond.Searching nearby is like spitting in the ocean and expecting it to make a difference.




#17 geertd

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Posted 22 October 2013 - 21:29

as of today we  passed officialy the 1000 exoplanets 

http://exoplanet.eu/catalog/



#18 thomastmc

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Posted 23 October 2013 - 03:41

The assumption that life needs or even prefers earth like planets is about as arrogant as this


Agreed, we have already seen microbial life living in the depths of the earth, organisms living on volcanic lava, and in super freezing temperatures.
 
Most of the life on Earth needs an Earth-like planet to live outside of Earth, life itself does not.


Life does live in extreme conditions, and there's probably life on planets that we'd never imagine that life could exist on, but...

This isn't about finding life on an exoplanet, because we can't. We're not going to any planets outside of our solar system for quite a long time. Many astronomers and exobiologists believe that life exists anywhere and everywhere it can, and we know without a doubt that it thrives in Earth-like conditions. To many, finding an Earth-like planet is equivalent to finding life. And, for at least most of us, that's probably the best we're ever going to get.
 
It's been proven in many ways that life almost certainly exists outside of the solar system, and an earth-like planet is basically the last missing clue until/if we find life elsewhere in our solar system, until/if we can go to another star, or until/if we're visited by aliens or intercept their communications from hundreds or thousands of years ago. Anyway you look at it, earth-like planets are bound to exist and we're bound to find them, everything else is a huge maybe.



#19 arachnoid

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Posted 23 October 2013 - 10:16

And that nicely brings up the subject of just what life we are actually seeking, after all being carbon based life forms are we limiting ourselves to this small perceptual basis.There may be life in a way on such planets as the Sun with its extreme high temperatures or Mars with its extreme low temperatures.In such cases the "life forms" may be unrecognizable to our limited understanding of science and even if they were somewhat similar to Earth bound life the lander onboard cameras would not pick them up due to the way they scan to compose images.



#20 ShockD

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Posted 23 October 2013 - 10:28

While finding a new Earth will be without precedent and absolutely exciting, such planet will be of no use to us because it will be too far to be reached in a human lifespan.

 

So yeah I'm more interested in actually finding an alien form of life.



#21 thekim

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Posted 23 October 2013 - 10:50

one thousand... we talking about billions in one galaxy and they are disappointed because the first thousand was a fail...

mkay



#22 +zhiVago

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Posted 23 October 2013 - 11:36

One thousand exoplanets...

 

This is like a drop in the ocean.



#23 arachnoid

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Posted 23 October 2013 - 15:06

You have to remember too that not all life forms even of the same carbon based type will be at the same stage of their life cycle.Some may be at the amebic level quite happily living in a pool whilst others may be more advanced and at a transitional stage of evolution also what divergence happened to Apes on Earth may happen to say Lizards on another.



#24 OP Crisp

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Posted 23 October 2013 - 16:22

While finding a new Earth will be without precedent and absolutely exciting, such planet will be of no use to us because it will be too far to be reached in a human lifespan.

 

Not necessary, achieving the speed of light opens the window to travel to the edge of our own galaxy withing 70 years.



#25 ShockD

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Posted 23 October 2013 - 17:12

Not necessary, achieving the speed of light opens the window to travel to the edge of our own galaxy withing 70 years.

If an object with any mass were to achieve the speed of light, its mass would become infinite, which seems impossible in its own right. But assuming that the object did achieve infinite mass during light-speed travel, to keep moving, the power behind its thrust or push would need to be infinite as well. No force in the known universe can achieve this, short of space-time itself.

 

So I rather see wormholes working than this.



#26 Xerino

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Posted 24 October 2013 - 20:29

There are no more like Earth, becuase God only made one.

 

 

Really???



#27 arachnoid

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Posted 24 October 2013 - 20:49

 

There are no more like Earth, becuase God only made one.

 

 

Actually I was just coming back in the car from the local shop when astronomer Dr Stuart Clark refered to the statement on Inside Science BBC4.He clarified the statement by saying that the Planets around the Earth had a unique placement compared to other solar systems and that the statement refered to this and a lack of similarity in both size and atmosphere of other planets.[around 16:45-22:20]

http://www.bbc.co.uk...rammes/b03dvc0d



#28 thomastmc

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Posted 25 October 2013 - 22:28

And that nicely brings up the subject of just what life we are actually seeking, after all being carbon based life forms are we limiting ourselves to this small perceptual basis.There may be life in a way on such planets as the Sun with its extreme high temperatures or Mars with its extreme low temperatures.In such cases the "life forms" may be unrecognizable to our limited understanding of science and even if they were somewhat similar to Earth bound life the lander onboard cameras would not pick them up due to the way they scan to compose images.

 

Could there be life forms that live in stars like the Sun that we have no clue even exist, sure. It's possible because we don't even know what we don't know yet, but it's extremely unlikely.

 

Right now we know that carbon based life exists, and we know that carbon based life has many advantages compared to silicon life because of it's chemistry. Carbon has more possible chemical reactions than silicon, and this we do know.

 

Looking for anything else, until there's evidence that it actually exists, is like hunting for Easter eggs in August.

 

Let's look for what we know can exist first, and once we've found that we can look for something else if there is any evidence that it might also exist.