Gallery: NASA PICS: Farthest Ever Solar-Powered Journey Takes Off Today...

 
If you're sad about the recent retiring of NASA's shuttle program, here's news that should pick your spirits up: brand new photos of NASA's Juno spacecraft lifting off for deep space! NASA's solar-powered Juno spacecraft took off this morning and began the longest solar-powered trip ever taken. Even cooler, one hour after launch, the spacecraft with let loose its three giant solar sails -- each measuring close to nine feet by thirty feet -- which will be its only source of power on its five year journey to Jupiter as well as the planned one year of exploration after it arrives. At the start of the journey, the 19,000 solar cells on Juno's sails will generate 14 kilowatts of energy but as it drifts closer to its final destination that output will drop to just 400 watts.

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2 Comments

  1. Kalyn October 3, 2011 at 8:22 pm

    Shiver me timbers, them’s some great infromaiton.

  2. zeppflyer August 5, 2011 at 2:21 pm

    A perfect example of the groundside benefits of space exploration beyond videos of people floating around. Of course, there is nothing inherently ‘green’ about this mission. In fact, since the Atlas rocket which launches it burns a mixture of Liquid Oxygen and a fuel very close to kerosene, it is considerably more polluting than the shuttle’s LOX/hydrogen engines.

    However, even though using solar power in space is no more or less green than using a nuclear reactor as most probes do, the R&D invested in making solar panels light and efficient will create more applications for them on earth. This is the immediate green upside of space exploration.

    You should note too that these are not solar sails. Solar sails are extremely large, very thin membranes attached to spacecraft which use the pressure of solar radiation to propel the craft away from the sun. They have never been deployed except in small scale experiments and scifi novels. These are just solar panels which collect sunlight to turn it into electricity. All of the craft’s propulsion comes from chemical rockets which put it on course and pressurized gas to make adjustments later on.

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