In the past ten years, Solar sails, which are made of ultra-thin polymer and utilize the Sun’s photons for propulsion, have been launched into orbit. However, NASA is currently preparing to launch their own version. Recently, on January 30, the solar sail passed its final test and effectively unfurled one quadrant of its 100-foot-long boom. According to NASA, the technology has reached TRL (technology readiness level) 6, indicating its readiness for use in space missions.
Going on deep space missions may involve various factors, yet being “inexpensive” is not one of them. The process of launching a spacecraft (along with a lifetime stock of fuel) beyond the orbit of Earth requires a considerable amount of funding. Fortunately, NASA, in partnership with its space subcontractor, Redwire, has devised a plan to alleviate both the weight and the expenses – a solar sail.
Redwire has successfully launched one section of its solar sail at its facility in Colorado on January 30, 2024, demonstrating that the technology is now suitable for use in space missions. The solar sail team, led by NASA’s Marshall Space Flight Center, collaborated with NeXolve from Alabama and Redwire to develop the deployment mechanism for the sail while in space. The aluminum-coated polymer material was effectively deployed along a 100-foot-long boom, and once all four quadrants are deployed in space, it will cover an area of 17,780 square feet and provide power for space missions with light payloads.
The Solar Sail designed by Carl Sagan has been prepared for its maiden voyage. This innovative spacecraft, which can travel through both the atmosphere and outer space, is finally ready to take flight. It is equipped with advanced technology and can navigate through the vastness of space to explore various astronomical objects, planets, and the universe. This long-awaited launch marks a significant milestone in the field of space exploration. The Solar Sail will serve as a vehicle to unlock the mysteries of the universe and expand our understanding of the vastness of space.
According to NASA technologist Les Johnson, the recent ground tests have been the final step in preparing for potential space exploration missions. In a press statement, he stated that the next step would be for scientists to suggest using solar sails in their missions. With the successful completion of their goal, the team has proven their readiness for flight.
The concept of solar sails is not a recent one – it has been discussed in science fiction communities for many years. However, this idea has now become a reality thanks to the Japanese space agency JAXA, who launched the first spacecraft to demonstrate solar sail technology in 2010, called IKAROS. In the United States, the non-profit organization The Planetary Society also launched their own solar sail, Lightsail 1, on a ULA Atlas V rocket in 2015. They later achieved successful deployment of LightSail 2 in 2019. Finally, NASA has also joined in on the action, as seen with their recent mission to collect a sample from the asteroid Bennu.
According to Johnson, when leaving Earth’s gravitational pull and entering space, the key factors are efficiency and sufficient propulsion to move between locations. A solar sail accomplishes this by reflecting sunlight, with a larger sail providing greater thrust.
The sails require a purpose to fulfill. Heliophysics is a potential field where these sails could prove highly advantageous. The high amount of fuel required to transport a spacecraft to the poles of the Sun can be a hindrance, but this obstacle can be overcome if the spacecraft is powered by the same element it is investigating.