How does a GPS? The satellites show the way - Planet school - SWR

Anyone who has at one time verfranst car knows of dying in a foreign environment, the benefits of a navigation satellite system Schatzer. Directional signs on display and voice mail of a dying, "said co-pilot, wos to go. Only a few are aware they know that behind the technology is extremely expensive. 24 satellites of the U.S. Global Positioning System (GPS), turning the earth to die and send radio signals With the help of whom die positionCars, planes or ships started to determine. How does the exhibition vivid computer animations. More about this topic: www.europe-school schule.de Planet Internet: www.europe-http www.ardmediathek.de schule.de More Videos

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Guns for the planet

Google Tech Talk 15th December 2009 Summary of Dr. John Hunter, president of the Quick Launch Presented, Inc. is dedicated to start Quick Launch rocket fuel and other materials into orbit with a gun of hydrogen gas. SHARP Quicklaunchers are the rocket that was originally developed at Lawrence Livermore National Laboratory. Over 90% of the mass necessary for crew lunar and Mars exploration is combustible. The turning point in the Quick Launch costs are less than $ 250/lb fuelDeposits in low earth orbit. These low costs allow manned exploration of the solar system in our lives. John begins the presentation of the history of weapons in court to participate, the populist practitioners. A brief overview of the physics of hydrogen gas guns and tasers are given. An animation design a Quick Start button to provide a propellant depot in low earth orbit. There will be ample room for questions and answers.

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