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Saturday, 07 August 2010 03:36
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Solar Sail Spacecraft Steers with Sunlight for First Time!

Japan's solar sail – a sun-powered spacecraft launched in May – has successfully steered by using just the pressure of sunlight against its square polymer sail, Japan space officials said.

The Japan Aerospace Exploration Agency spacecraft Ikaros now represents the first solar sail to have harnessed sunlight for both attitude control and propulsion, after it first launched May 21 alongside the Venus-bound orbiter Akatsuki.

Liquid crystal panels on the edges of the sail can change their surface reflection of sunlight by using low amounts of electricity to turn on or off. The "on" setting creates a mirror-like reflection that pushes the spacecraft forward, while the "off" setting has a more diffuse reflection that redirects the pressure of sunlight in all directions, lessening the force against the sail.

READ MORE: Space.com

 

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