Powerful laser simulates stellar jet[ Wed, 25 Nov 2009 21:48:09 GMT ]Astrophysicists no longer sit and idly wonder what happens when a powerful stellar jet from a young star collides with giant clouds of gas and dust. They first watch what happens hundreds of light years away, and then recreate the cosmic event with a multi-trillion-watt laser capable of delivering more power than exists in the entire U.S. power grid.