Universe Documentary ✩ Interstellar Travel ✩ Space Documentary HD

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Interstellar travel is the term used for hypothetical piloted or unpiloted travel between stars or planetary systems. Interstellar travel will be much more difficult than interplanetary spaceflight; the distances between the planets in the Solar System are less than 30 astronomical units (AU)—whereas the distances between stars are typically hundreds of thousands of AU, and usually expressed in light-years. Because of the vastness of those distances, interstellar travel would require a high percentage of the speed of light, or huge travel time, lasting from decades to millennia or longer.

The speeds required for interstellar travel in a human lifetime far exceed what current methods of spacecraft propulsion can provide. Even with a hypothetically perfectly efficient propulsion system, the kinetic energy corresponding to those speeds is enormous by today's standards of energy production. Moreover, collisions by the spacecraft with cosmic dust and gas can produce very dangerous effects both to passengers and the spacecraft itself.

A number of strategies have been proposed to deal with these problems, ranging from giant arks that would carry entire societies and ecosystems, to microscopic space probes. Many different spacecraft propulsion systems have been proposed to give spacecraft the required speeds, including nuclear propulsion, beam-powered propulsion, and methods based on speculative physics.

For both piloted and unpiloted interstellar travel, considerable technological and economic challenges need to be met. Even the most optimistic views about interstellar travel see it as only being feasible decades from now—the more common view is that it is a century or more away. However, in spite of the challenges, if interstellar travel should ever be realized, then a wide range of scientific benefits can be expected.[1]

Most interstellar travel concepts require a developed space logistics system capable of moving millions of metric tons to a construction / operating location, and most would require gigawatt scale power for construction or power (such as Star Wisp or Light Sail type concepts). Such a system could grow organically if space-based solar power became a significant component of Earth's energy mix. Consumer demand for a multi-terawatt system would automatically create the necessary multi-million metric ton/year logistical system.
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This is a beautifully well achieved documentary. So good in fact, it held the wide eyed attention of a 7 yr old that wants to travel to other stars.

kevinpittman
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I literally searched for this video. Am I a nerd?

syntheticderangement
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But i think antimatter can be produced by a ramjet process cause by acceleration of the spacecraft by other powerful engines such as a nuclear engine.

captsonko.
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Wow, Imagine looking up at the sky and seeing the two stars A and B. You'll feel like your in a Science Fiction move

roido
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But 'looking into space, is looking back in time' right? So, what we see might be destroyed 10000 years ago!?

sukmikehok
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I’m not sure 4 light years is *this close to home* on current engines it’s 70k years away.. all relative I guess

Rob-cyxc
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Oh yeah just so you guys know the ship in the thumbnail is the spirit of fire from the halo wars series.

Real creative life science.

g.w.k.y
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We can colonize space slowly in our current technology, first build moon base or colony then next is Mars, it's easy to get into Mars if we have build are base in moon, build spaceport, if we succeeded to get on Mars the next is the jupiter and saturn moons, slowly slowly we get farther and farther to reach, until we colonize are solar system, o believe by this time our technology is good enough to do interstellar colonization, , to colonize are solar system first before we do interstellar travel or colonization

kennethdelacruz
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"assuming its worth the trip, you'd need 30, 000 times the orbit of saturn to reach alpha centauri, to put that into another perspective, if earth to saturn is a meter, then earth to centauri is New York to Chicago" and " the voyager is traveling 60, 000 mph, if its headed to the right direction, it would need 73, 000 years to reach apha centauri" is the most depressing thing to hear especially due to the fact that mankind is dying.

infamousarsonist
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the similar athmosphere on both planets,

happyandhealthy
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the same data in similar athmosphere and predicitions

happyandhealthy
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you can see planets in any given moment

happyandhealthy
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@ 00:46 turn that red line on the left side, have it come from bottom to the top, we're still being invaded on the southern border....

jessejohnson
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Oh, but a planet HAS been detected orbiting Proxima...

staffellandstewart
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Oi, are you going to repeat everything you said twice.

v.prestorpnrcrtlcrt
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Maybe we shouldn't overpopulate the planet... do what the chines gov did: "one-child-policy", but for the whole planet.

Ronnybanan
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This video is full of dramatic misstatements, such as that there were more deaths from war in the 19th century than in the 20th century! (No, there weren't, and it is not even close.) Some of the numbers and estimates of distances and speeds are far from accurate as well.

timothywilliams
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I’m scared I’m suppose to be on yotube only YouTube kids help pleas

LeighJFP