Space exploration is largely dependent on innovations in propulsion systems. The immense advantage in terms of autonomy offered by an efficient solar sail is of great interest to space agencies…
This technology, known as light veiling or photoveiling, uses a sail driven by light rather than wind. This means of propulsion seems to be a promising solution in order to reach great distances. In addition, this solution makes it possible to save fuel. In effect, the sail relies on the radiation pressure emitted by the stars to move through space like a sailboat.
In two new studies, researchers examined the best way to design a light sail for interstellar travel. They found that it should be puffy and have a grid-like pattern. They also drew some conclusions regarding to the best materials to use.
These studies were conducted as part of the Breakthrough Starshot initiative. This research and engineering project aims to develop new models of light sailing vehicles able to travel to Alpha Centaure. This star is closest to the solar system.
Breakthrough Starshot: it would be possible to reach Alpha Centauri in 20 years
Breakthrough Starshot aims to develop a lightweight sail that would carry a microchip-sized probe at 20% the speed of light. This high speed would allow the probe to reach Alpha Centauri. in just 20 years, according to a press release. For reference, this is regarding 4 light years from Earth. Some experts believe that it should at least 6,300 years to reach the system with current technology.
In 2019, the Planetary Society launched a solar-powered spacecraft called LightSail 2 into Earth orbit. The project was crowdfunded. If the microsatellite in question – a cubesat – did not measure more than twenty centimeters on a side, the sail itself extended over 32 square meters. The Japanese space agency JAXA also launched a spacecraft using the same type of technologycalled Ikaros.
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Source : space.com
