NASA proposes system to power spacecraft with Earth's magnetic field

09/3/2010 | Discovery

NASA is preparing a bid to demonstrate an innovative, chemical-free technology that would propel spacecraft without fuel but with the use of a tether that generates an electric current that pushes against Earth's magnetic field. In addition to propelling spacecraft, the tether could lower a satellite's orbit to allow it to more quickly re-enter Earth's atmosphere at the end of its life and avoid becoming another piece of space debris.

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