NASA-Supported Solar Sail Could Take Science to New Heights
upstart writes:
NASA-Supported Solar Sail Could Take Science to New Heights:
As NASA's exploration continues to push boundaries, a new solar sail concept selected by the agency for development toward a demonstration mission could carry science to new destinations.
The Diffractive Solar Sailing project was selected for Phase III study under the NASA Innovative Advanced Concepts (NIAC) program. Phase III aims to strategically transition NIAC concepts with the highest potential impact for NASA, other government agencies, or commercial partners.
"As we venture farther out into the cosmos than ever before, we'll need innovative, cutting-edge technologies to drive our missions," said NASA Administrator Bill Nelson. "The NASA Innovative Advanced Concepts program helps to unlock visionary ideas - like novel solar sails - and bring them closer to reality."
Like a sailboat using wind to cross the ocean, solar sails use the pressure exerted by sunlight to propel a craft through space. Existing reflective solar sail designs are typically very large and very thin, and they are limited by the direction of the sunlight, forcing tradeoffs between power and navigation. Diffractive lightsails would use small gratings embedded in thin films to take advantage of a property of light called diffraction, which causes light to spread out when it passes through a narrow opening. This would allow the spacecraft to make more efficient use of sunlight without sacrificing maneuverability.
[...] Work under Phase III will optimize the sail material and perform ground tests in support of this conceptual solar mission. Orbits passing over the Sun's north and south poles are difficult to achieve using conventional spacecraft propulsion. Lightweight diffractive lightsails, propelled by the constant pressure of sunlight, could place a constellation of science spacecraft in orbit around the Sun's poles to advance our understanding of the Sun and improve our space weather forecasting capabilities.
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