Youtor
Could We Move The Sun
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=YFmj-0atHdk
In this short video explainer, Universe Today publisher Fraser Cain explores the radical idea that a future advanced civilization could actually move their star, using a concept of a Shkadov Thruster, or stellar engine. In just a few billion years, you could move your star anywhere you wanted in the Milky Way. • http://www.universetoday.com/103896/c... • ----------------- • An idea that really captures my imagination is what kinds of future civilizations there might be. • And I'm not the only one. In 1964, the Soviet astronomer Nikolai Kardashev defined the future of civilizations based on the amount of energy they might consume. • A Type I civilization would use the power of their entire planet. Type II, a star system, and a Type III would harness the energy of an entire galaxy. • It boggles the mind to think about the engineering required to rearrange the stars of an entire galaxy. • Is it possible to move a star? Could we move the Sun? • This idea was first proposed by physicist Dr. Leonid Shkadov in his 1987 paper, Possibility of controlling solar system motion in the galaxy . • Here's how it works. • A future alien civilization would construct a gigantic reflective structure on one side of their star. • Light from the star would strike this structure and bounce off, pushing it away. • If this reflective structure had enough mass, it would also attract the star with its gravity. • The star would be trying to push the structure away, but the structure would be pulling the star along with it. • If a future civilization could get this in perfect balance, it would be able to pull the star around in the galaxy, using its own starlight as thrust. • At first, you wouldn't get a lot of speed • But by directing half the energy of a star, you could get it moving through the galaxy. • Over the course of a million years, you would have changed its velocity by about 20 meters/second. The star would have traveled about 0.3 light years, less than 10% of the way to Alpha Centauri. • Keep it up for a billion years and you would be moving a thousand times faster. Allowing you to travel 34,000 light years, a significant portion of the galaxy. • Imagine a future civilization using this technique to move their stars to better locations, or even rearranging huge portions of a galaxy for their own energy purposes. • This may sound theoretical, but Duncan Forgan, from the University of Edinburgh suggests a practical way to search for aliens moving their stars. • According to him, you could use planet-hunting telescopes like Kepler to detect the bizarre light signatures we'd see from a Shkadov Thruster. • There's nothing in the laws of physics that says it can't happen. • It's fun to think about, and gives us another way that we could search for alien civilizations out there across the galaxy.
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