Journey to Deepest Space(full documentary)HD by Documentaries in HD   3 years ago

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Interstellar space travel is manned or unmanned travel between stars. Interstellar travel is much more difficult than interplanetary travel: the distances between the planets in the Solar System are typically measured in standard astronomical units while the distances between stars are typically hundreds of thousands of AU, and usually expressed in light years. Because of this some combination of great speed (some percentage of the speed of light) and huge travel time (lasting from years to millennia) would be required.

Deadly Space Tornadoes:http://youtu.be/6z2el1cdE2E

Alien Sky Symbols:http://youtu.be/P1NpO7Rh5Lw

The End of The Universe:http://youtu.be/eEowC_wfbdc

Underground Space Station on Mars:http://youtu.be/IIivGO_1lZQ

Quantum Mechanics:http://youtu.be/TfmjL1fAZ5Q

Alien Planets:http://youtu.be/rBq0ZiYVDiw

Monster Black Holes:http://youtu.be/RChQtlCeUgM

New Secrets of Our Galaxy:http://youtu.be/QPD9mQlv7H8

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