May 17

Japan will launch the world’s first spacecraft tomorrow drawing its energy from a huge solar-powered sail.

japan-to-launch-sail-powered-spacecraft
The craft will be launched aboard an H-IIA rocket before unfurling its ultra-thin membrane ‘sail’ half the thickness of a human hair once it is in space Photo: BLOOMBERG

Ikaros – which stands for Interplanetary Kite-Craft Accelerated by Radiation of the Sun – works on the same principle as a yacht, according to the Japan Aerospace Exploration Agency.

It will be launched from the island of Tanegashima aboard an H-IIA rocket before unfurling its ultra-thin membrane “sail” – half the thickness of a human hair – once it is in space.

Solar particles emitted by the sun will hit the 66ft sail to propel it through space towards Venus. Photons bounce off thousands of tiny mirrors to push it through the resistance-free environment.

And as the force acts continuously, a solar sail will eventually be able to reach speeds that are up to ten times greater than any rocket powered by conventional chemicals.

The 307kg craft also has engines that draw their energy from solar cells on the craft and act as a “hybrid” engine, primarily for steering it on its mission.

Yuichi Tsuda, deputy manager for the project, said: “We believe Ikaros will take six months to reach Venus, which we will use to test the craft and its responses, but after that we want it continue to fly for as long and as far as possible.” Continue reading »

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