Alien Worlds Beyond Our Solar System - Full Documentary HD
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Alien Worlds Beyond Our Solar System - Full Documentary HD Alien Earth | Life Beyond Earth One of eight new planets spied in distant solar systems has usurped the title of "most Earth-like alien world", astronomers have said. All eight were picked out by Nasa's Kepler space telescope, taking its tally of such "exoplanets" past 1,000. But only three sit safely within the "habitable zone" of their host star - and one in particular is rocky, like Earth, as well as only slightly warmer. The find was revealed at a meeting of the American Astronomical Society. Red sky The three potentially habitable planets join Kepler's "hall of fame", which now boasts eight fascinating planetary prospects. And researchers say the most Earth-like of the new arrivals, known as Kepler 438b, is probably even more similar to our home than Kepler 186f - which previously looked to be our most likely twin. At 12% larger than Earth, the new claimant is bigger than 186f but it is closer to our temperature, probably receiving just 40% more heat from its sun than we do from ours. So if we could stand on the surface of 438b it may well be warmer than here, according to Dr Doug Caldwell from the Seti (Search for Extra-Terrestrial Intelligence) Institute in California. "And it's around a cooler [red dwarf] star... so your sky would look redder than ours does to us," Dr Caldwell said. That first-person encounter, however, is unlikely - both because the planet is 475 light-years away and because we still have essentially no idea what it's made of. Images from the Kepler telescope, which trails behind the Earth and peers far into the distance as we orbit our own sun, are used to identify far-off planets by observing "transits". This refers to the dimming of a star's light when a planet passes in front of it. A large team of researchers then uses additional data from Earth-bound telescopes to further explore these unfamiliar solar systems. They try to calculate how big the planets are, and how closely they orbit their host stars. Not everything that causes such a dimming eventually turns out to be a planet, however. At the same time as the eight confirmed new exoplanets were announced by a 26-strong team spanning Nasa and multiple US institutions, the Kepler mission's own scientists released another tranche of more than 500 "candidate" planets. "With further observation, some of these candidates may turn out not to be planets," said Kepler science officer, Fergal Mullally. "Or as we understand their properties better, they may move around in, or even outside, the habitable zone." 'Star Trek' scenario Even once scientists have anointed a candidate as a confirmed exoplanet, the question of whether or not it is "Earth-like" is a fraught one, with fuzzy boundaries. The size of the habitable, or "Goldilocks" zone, where a planet is far enough from its sun to hold water but not so distant that it freezes, depends on how confident scientists want to be with their guess-work. According to Dr Cardwell, just three of the eight new exoplanets can be confidently placed in that zone - and only two of those are probably rocky like the Earth. More detailed description is very difficult. "From the Kepler measurements and the other measurements we made, we don't know if these planets have oceans with fish and continents with trees," Dr Caldwell told BBC News. "All we know is their size and the energy they're receiving from their star. "So we can say: Well, they're of a size that they're likely to be rocky, and the energy they're getting is comparable to what the Earth is getting. "As we fill in these gaps in our solar system that we don't have, we learn more about what it means to be Earth-like, in some sense." Speaking at a related event at the conference, Prof Debra Fischer from Yale University said she remembered a time before the first exoplanet was discovered, more than two decades ago. "I remember astronomers before that point being very worried," she said. "We really had to step back and say: Maybe the Star Trek picture is wrong. That filled me with despair." Prof Fischer said that sensitive telescopes like Kepler had ushered in an era of "amazing and impressive work". "We're talking about a planet - and we can only see its star with a powerful telescope. "And we can draw graphs and sketch its composition and have serious scientific discussions. This is incredible." Subscribe us Thanks for watching *Subscribe for more HD Documentaries
Comments
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WAIT so your telling me there's a new planet!? 😯😯😯😯😯😯
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so nice
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I don't know how scientist will give responsibility to take exploring out to galaxy way
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titits fake.. black hole in middle of miltky way? nonono these things are 9100000000000000000000000000000 light yeaarss away
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MUY INTERESANTE : 02-11-2016
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I saw this one way back in 2012.
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"During its 26 month orbit, its summer season is barely 2 months long...BUT WHAT A SEASON!" @ 17:40min - He says it in such a creepy voice.
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So into this
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all free masons, known liars, why are you even listening to them? You know it's garbage
NASA - SATAN ! IT'S GETTING OLD NOW... just show us the firmament, we know you've seen it and have been lying to us about fake space for decades now, using CGI and cartoons to sell us your 'stories'...
I wanna see the firmament - I'm NOT interested in these porkies.
I wanna know, why you won't show us the Giants' bones, why you won't tell us the truth about where we really live. What's the big problem? Do nephilim have you by your neck?
They will NEVER get into Heaven, EVER ! THEY HAVE TO STOP TRYING and stop lying to us in order to use and abuse us. I've really had enough of all these stupid lies with a straight face.... this is getting ridiculous -
lol I don't know if any of this is true it's not like they been on the planet lmao
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hello
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mast
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amazing
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nice video I look it
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What if the yoyo planet doesn't go inside of the goldie lochs zone. The moon warms up to just shy of 100C and the oceans don't boil. How strong would the magnetic field of the yoyo planet have to be to protect the moon from having its atmosphere stripped away by the solar wind when it is close? Lets say the yoyo moon is an Earth sized planet captured when the yoyo moved in to its current orbit. It has its own magnetic field and its the reverse polarity of the yoyo planet. The magnetic mess would be interesting.
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24:55 did she just said fuckanoes
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this is global firing
why not global burning -
This shit makes me want to die
45m 49sLenght
762Rating