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---------------------------------------------------------------------- What kind of space propulsion needs no fuel? ---------------------------------------------------------------------- A new device called an electrodynamic orbital tether will make it possible for orbiting spacecraft to maneuver without using up fuel. An electrodynamic tether is a long wire that is unreeled upward or downward from a spacecraft, together with an ion-releasing device called a plasma contactor. It works by taking advantage of forces generated in the wire when current flows through it as it slices through the planet's magnetic field. A tether can be used to increase the altitude of an orbit, in which case it consumes electrical power, or it can cause the orbit to become lower, in which case it acts as an electrical generator. Scientists are considering using solar-powered electrodynamic tethers for future missions to Jupiter, a planet with a strong magnetic field. A space probe with such a system could maneuver for many years among Jupiter's moons, powered by sunlight and propelled by the planet's magnetic field. | ||||||||||||||||
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The Top 10 LIFE-LESSONS FROM NOAH'S ARK The Biblical story of the great flood (see Genesis 6:1-9:17)has been around for a long time. It has counterparts in many other cultures. Each generation has learned much from the story -- and so can those of us in the coaching community! Needless to say, "Always build on the highest ground possible", because character always counts! Here are ten more: 1. Always plan ahead. There wasn't any rain in the forecast when Noah started building the ark. 2. Don't listen to your critics. Listen instead to your heart, and then do whatever has to be done. The neighbors might have taunted when Noah was blocking their driveway -- but he had the last laugh as soon as the rain began falling! 3. Stay physically, mentally, spiritually and emotionally fit. You never know but that when you're 600 years old, someone might come along out of the blue and ask you to do something REALLY big! 4. Don't seek to go it alone. Always travel, at least, in pairs, because two heads are better than one. 5. Speed is not always an advantage. The cheetahs were on board, but so were the snails; and they all arrived safely on dry ground at the very same time. 6. Handle Conflict with certainty. If you can't fight or flee from adversity -- at least make certain you have an idea that can float in the battlefield of ideas! 7. Don't miss the boat! Never forget this underlying truth: that ultimately when all is said and done, we're all in the same boat! 8. Be flexible in your thinking. Remember that amateurs built the ark while professionals built the Titanic and the Challenger Space Shuttle. 9. Remember that Fear is nothing more than "False Evidence Appearing Real". The woodpeckers on the INSIDE are often a bigger threat to your overall well being than the storms raging on the outside. 10. Remain faithful and optimistic. No matter how bleak things look, if God is traveling with you, there's always going to be a rainbow of peace on the other side of the storm. | |||||||||||||||||
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