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Then -- aliens to exist scientists have believing that there are three key ingredients necessary.
Well yeah I guess there are three or more we don't really know very much about the aliens because we've never met any -- You alien thing.
-- -- I'm just a bad there doesn't have basket when he -- me and I -- isn't -- -- here.
That's the thing about aliens as you would expect.
If they're interesting aliens.
They would want to talk to us so we -- intelligent -- once we really want chances are the ones we'll find first aren't bright -- all they're probably really dumb so.
A lot of the search for life in the universe is about the search for stupid law.
Not the search for intelligent life and there's just been a breakthrough in the last couple of days.
-- this at NASA's Kepler mission -- NASA's Kepler mission is a really good mission inexpensive on mission it's turning out some really great science for the first time.
The Kepler scientists have discovered.
Two planets that are -- the same size as earth these are the smallest planet and and -- -- literally almost the exact same size and there and there were reading a start -- the -- priority -- -- -- -- is very far -- it's 900.
Fifteen light years away so we're not going there anytime soon.
But right now we're looking at the approximate sizes of these -- -- -- small one of the twentieth has almost exactly the same sizes as the -- But they are both quite a bit heavier than earth so we haven't found a twin -- yet and that's really the holy Grail to find an analog earth.
Planet that's our size our -- into -- that's what's called the goldilocks zone meaning it's in the habitable zone around it starts not too hot.
It's not too cold for liquid water to form and therefore for life as we know it.
And it would be even crazier we off color wins there wouldn't mind playing creepy.
We've got a lot of them some things didn't do a demonstration I had a cross is not because that's you know that's how -- I just wanted to show you how that.
Kepler mission finds things basically Kepler is if you go outside on a summer night in the Northern Hemisphere -- back.
Look straight up.
You are looking pretty much in the direction we're Kepler is looking it's looking in the constellation -- this on under the armpit of the swamp.
It's staring at an area where there are -- 975000.
And what it's looking for is -- looking for a little planet.
To go across in front of one of those markets there's all the stars and when it sees.
Planet come across the star there's a minute didn't brightness and that a lot of cameras for re okay here and have to concede -- making a bright light.
First chemistry so this is our star a hold off to decide.
That's our star.
You know I'm going to pass a planet crossing from that when the -- it comes across the front you see -- different brightness little hard to see on camera.
-- -- see that little different brightness.
Yeah -- -- has just an airplane on practicing at.
-- it is when you're looking for -- but -- of course is weighing.
Far -- where plans travel so what it sees is it doesn't it's easy to find it sees that the star behind it gets a little bit dimmer now.
Trick of the universe it turns out that most solar systems.
Have planets at all orbit within very very fine.
Amount of space if in this.
Dvd where our solar system where many of the solar system's many of the star systems and kept us looking out all the planets would be within the thinness.
Of this -- so -- can only detect the planet if the planet lies between.
-- -- There may be other planetary systems that are oriented like this -- like that -- won't find those funds but the good news is -- stares -- these enormous number of -- stars sees lots of little bits of brightness and has found over 2300.
-- -- -- candidates they need to be confirmed by astronomers on the ground and then.
Well first of all this you know I think it sounds beautiful and it's it's very abstract for most of us out probably say so if we can talk a little bit more about that.
Possibility of alien life to -- -- really but that is a positive -- for sure.
My you know -- -- I'll look -- I haven't had.
Yeah 80% of its goal and it comes down into every single movie they -- just take and why it.
-- -- -- -- -- Yeah a lot that's because human actors kind of look like yeah okay.
That are up here we've.
I don't know about Leon and an even in the last Indiana Jones hadn't had the big candy came to a point.
And that frankly fairly -- -- think that it's.
I don't know why scientists think that it that there there could be a life out there.
Well it's just about -- statistics it's just it was just a question statistics I mean the sites like to believe that we don't live in special times and special circumstances so what's.
Particularly unique about -- Now that Kepler and other missions are finding lots and lots of planets throughout justice galaxy and there are 5200 billion other galaxies out there.
You know it seems only a game of numbers that there should not only be life but some of -- -- should be intelligent.
Now the trick in my we don't have to worry about.
Aliens coming here is -- us you know that.
Those stars are enormously faraway -- down the speed of light is as far as we know pretty hard and fast cosmic speed limit.
You and I can't jump in the Starship Enterprise go to.
Let's start tracking got to be using the largest electric and I'm glad Atlanta or the other right -- the next question.
-- -- -- -- -- -- -- They -- it again.
This'll -- that you wanna let this thing is so this is the other way you find -- -- -- -- the transit method you look for the different brightness Galloway is that you look for a while hole.
And the star so my hand is the star of the planet is thing going around it.
Notice what's happening to my hand yes the planet is orbiting.
But so we'll do -- -- -- conceivable -- so is the stars the stars moving back and forth.
So if you look at the star overtime you don't -- the planet but you see a -- that's going into space in doing this right.
And that says there's something going around and from the speed at which it does that.
Scientists can deduce what the masses of the planets are how many of them there are and so if they look at the same started Kepler has determined that a brightness to confront.
Now you've got two lines of evidence that can be cross correlate it and if they point to the same mouth.
We're pretty sure that these plants are for real so to earth sized planets.
I'm an -- prediction 2012 was the year that scientists will find.
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- The massive -- -- for -- and a halo is the.
I'll -- back to report them as an alien so give me first.
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