Turn of fortune for NASA as solar sail successfully deploys


January 24, 2011

An artist's concept of a solar sail in Earth orbit (Image: NASA)

An artist's concept of a solar sail in Earth orbit (Image: NASA)

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What looked like a failed mission has turned into an unexpected win for NASA with the successful deployment of the first-ever solar sail in low-Earth orbit. More than a month after the NanoSail-D nanosatellite failed to eject from its parent satellite, engineers at NASA's Marshall Space Flight Center were pleasantly surprised when the 3.9 x 3.9 x 14.9-inch unit spontaneously separated from the Fast Affordable Scientific and Technology Satellite (FASTSAT) last week. On January 20, after a timed three-day countdown, the ultra-thin, 100-square-foot (9.29 m2) polymer sail carried by the nanosatellite was unfurled 404 miles (650 km) above Earth where it will remain in orbit for up to 120 days.

The NanoSail-D was one of six experiments launched aboard FASTSAT in November 2010. The ejection was originally triggered on December 6, but the NanoSail-D became stuck and failed to separate from FASTSAT.

Now, after last week's surprising turn of events, the solar-sail mission will be able to continue with its objectives. As well as demonstrating the deployment of a compact solar sail boom, these objectives include testing the de-orbit potential of the technology. Because the sail experiences drag from the upper atmosphere it will drop from orbit in 70 to 120 days and NASA hopes that this approach can be used to bring down satellites at the end of their lifetime and therefore help clean up space debris.

Solar sail technology also has immense potential as a means of propulsion in space and while the NanoSail-D is likely to experience too much atmospheric drag for the pressure of sunlight on the sail to be measured, NASA still hopes to that the experiment could lead to advances of this use of the technology.

In June last year the Japan Aerospace Exploration Agency's IKAROS space yacht became the first craft to deploy a solar sail in space.

The position of NanoSail-D can be tracked here and the craft will continue to send out beacon signals (at 437.270 MHz) until its onboard batteries are expended. NASA and are also running a competition for the best amateur images of NanoSail-D in orbit.

About the Author
Noel McKeegan After a misspent youth at law school, Noel began to dabble in tech research, writing and things with wheels that go fast. This bus dropped him at the door of a freshly sprouted in 2002. He has been Gizmag's Editor-in-Chief since 2007. All articles by Noel McKeegan

\"Spontaneously\"? I think the definition for that is \"We don\'t have a clue how it happened!\"


We owe thanks to the Martians who assisted us on this one. :)

Paul Anthony

Mustuv been the aliens....


Looks like it\'s built of MDF board, Masonite, screws and hinges from a store like Home Depot.

Facebook User

dammit Spock! I told you to leave that alone,, you could be changing the future

Bill Bennett

MDF in spaaaaaace! Do satellites really need to be built out of the highest of high tech materials?

Those cheap stamped steel shelving units become quite rigid once all the parts are bolted together, yet are very lightweight. Lots of holes in the posts to attach things to.

Gregg Eshelman
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