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Top photos of 2013 for the year in space news and exploration.
40 of 52
Two suborbital rockets were successfully launched 15 seconds apart at the NASA Wallops Flight Facility off the coast of Virginia, the morning of July 4, 2013. As part of a study of electrical currents in the ionosphere, the project is designed to study a global electrical current called the dynamo, which sweeps through the ionosphere..The first rocket carried a payload that collected data on the neutral and charged particles in the ionosphere. The second rocket released a long trail of lithium gas to track how the upper atmospheric wind varies with altitude. These winds are believed to be the drivers of the dynamo currents. UPI/J. Eggers/ NASA
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