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Climate Action Is a Legal Obligation, European Court Rules
The European Court of Human Rights found that climate change is a human rights issue, providing a blueprint for Europeans to force their governments to tackle rising temperatures
NASA Next-Generation Solar Sail Boom Technology Ready for Launch
Sailing through space might sound like something out of science fiction, but the concept is no longer limited to books or the big screen. In April, a next-generation solar sail technology – known as the Advanced Composite Solar Sail System – will launch aboard Rocket Lab’s Electron rocket from the company’s Launch Complex 1 in Māhia, New Zealand. The technology could advance future space travel and expand our understanding of our Sun and solar system.
Solar sails use the pressure of sunlight for propulsion, angling toward or away from the Sun so that photons bounce off the reflective sail to push a spacecraft. This eliminates heavy propulsion systems and could enable longer duration and lower-cost missions. Although mass is reduced, solar sails have been limited by the material and structure of the booms, which act much like a sailboat’s mast. But NASA is about to change the sailing game for the future.
NASA’s Advanced Composite Solar Sail System could advance future space travel and expand our understanding of our Sun and Solar System.Credits: NASA’s Ames Research Center NASA’s New Lightweight Sailor
The Advanced Composite Solar Sail System demonstration uses a twelve-unit (12U) CubeSat built by NanoAvionics to test a new composite boom made from flexible polymer and carbon fiber materials that are stiffer and lighter than previous boom designs. The mission’s primary objective is to successfully demonstrate new boom deployment, but once deployed, the team also hopes to prove the sail’s performance.
Like a sailboat turning to capture the wind, the solar sail can adjust its orbit by angling its sail. After evaluating the boom deployment, the mission will test a series of maneuvers to change the spacecraft’s orbit and gather data for potential future missions with even larger sails.
“Booms have tended to be either heavy and metallic or made of lightweight composite with a bulky design – neither of which work well for today’s small spacecraft. Solar sails need very large, stable, and lightweight booms that can fold down compactly,” said Keats Wilkie, the mission’s principal investigator at NASA’s Langley Research Center in Hampton, Virginia. “This sail’s booms are tube-shaped and can be squashed flat and rolled like a tape measure into a small package while offering all the advantages of composite materials, like less bending and flexing during temperature changes.”
Mariano Perez, quality assurance engineer at NASA Ames, inspects the Advanced Composite Solar Sail System spacecraft. When the composite booms and solar sail deploy in orbit, they will measure about 860 square feet (80 square meters) – about the size of six parking spots. Credit: NASA/Brandon TorresNASA/Brandon TorresAfter reaching its Sun-synchronous orbit, about 600 miles (1,000 kilometers) above Earth, the spacecraft will begin unrolling its composite booms, which span the diagonals of the polymer sail. After approximately 25 minutes the solar sail will fully deploy, measuring about 860 square feet (80 square meters) – about the size of six parking spots. Spacecraft-mounted cameras will capture the sail’s big moment, monitoring its shape and symmetry during deployment.
With its large sail, the spacecraft may be visible from Earth if the lighting conditions are just right. Once fully expanded and at the proper orientation, the sail’s reflective material will be as bright as Sirius, the brightest star in the night sky.
“Seven meters of the deployable booms can roll up into a shape that fits in your hand,” said Alan Rhodes, the mission’s lead systems engineer at NASA’s Ames Research Center in California’s Silicon Valley. “The hope is that the new technologies verified on this spacecraft will inspire others to use them in ways we haven’t even considered.”
This artist’s concept shows the Advanced Composite Solar Sail System spacecraft sailing in space using the energy of the Sun. Credit: NASA/Aero Animation/Ben Schweighart Enabling Future Solar SailsThrough NASA’s Small Spacecraft Technology program, successful deployment and operation of the solar sail’s lightweight composite booms will prove the capability and open the door to larger scale missions to the Moon, Mars, and beyond.
This boom design could potentially support future solar sails as large as 5,400 square feet (500 square meters), about the size of a basketball court, and technology resulting from the mission’s success could support sails of up to 21,500 square feet (2,000 square meters) – about half a soccer field.
“The Sun will continue burning for billions of years, so we have a limitless source of propulsion. Instead of launching massive fuel tanks for future missions, we can launch larger sails that use “fuel” already available,” said Rhodes. “We will demonstrate a system that uses this abundant resource to take those next giant steps in exploration and science.”
Because the sails use the power of the Sun, they can provide constant thrust to support missions that require unique vantage points, such as those that seek to understand our Sun and its impact on Earth. Solar sails have long been a desired capability for missions that could carry early warning systems for monitoring solar weather. Solar storms and coronal mass ejections can cause considerable damage on Earth, overloading power grids, disrupting radio communications, and affecting aircraft and spacecraft.
Composite booms might also have a future beyond solar sailing: the lightweight design and compact packing system could make them the perfect material for constructing habitats on the Moon and Mars, acting as framing structures for buildings or compact antenna poles to create a communications relay for astronauts exploring the lunar surface.
“This technology sparks the imagination, reimagining the whole idea of sailing and applying it to space travel,” said Rudy Aquilina, project manager of the solar sail mission at NASA Ames. “Demonstrating the abilities of solar sails and lightweight, composite booms is the next step in using this technology to inspire future missions.”
NASA Ames manages the Advanced Composite Solar Sail System project and designed and built the onboard camera diagnostic system. NASA Langley designed and built the deployable composite booms and solar sail system. NASA’s Small Spacecraft Technology (SST) program office based at NASA Ames and led by the agency’s Space Technology Mission Directorate (STMD), funds and manages the mission. NASA STMD’s Game Changing Development program developed the deployable composite boom technology. Rocket Lab USA, Inc of Long Beach, California is providing launch services. NanoAvionics is providing the spacecraft bus.
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NASA Technology Helps Guard Against Lunar Dust
Defeating dust may be a small concern for most people on Earth, but for astronauts and spacecraft destined for the Moon or Mars, it is a significant hazard that must be mitigated. That’s why researchers at NASA’s Kennedy Space Center in Florida are seeking innovative ways to use Electrodynamic Dust Shield (EDS) technology.
Using transparent electrodes and electric fields, EDS technology can electrically lift and remove dust from a variety of surfaces for space applications ranging from thermal radiators, solar panels, and camera lenses to spacesuits, boots, and helmet visors. Controlling and removing the statically-charged dust will be critical to the success of Moon missions under the agency’s’ CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign.
“For these CLPS and Artemis missions, dust exposure is a concern because the lunar surface is far different than what we’re used to here,” said Dr. Charles Buhler, lead research scientist at the Electrostatics and Surface Physics Laboratory at Kennedy. “Lunar regolith dust can get into gaskets and seals, into hatches, and even into habitats, which can pose a lot of issues for spacecraft and astronauts.”
Unlike dust particles on Earth, dust on the Moon’s surface is sharp and abrasive – like tiny shards of glass – because it hasn’t been exposed to weathering and elements like water and oxygen.
“Simply brushing lunar regolith across surfaces can make the problem worse because it’s also very electrostatically charged and highly insulating,” Buhler said.
Based on the Electric Curtain concept developed by NASA in 1967, EDS technology has been in development at Kennedy since 2004.
It first made its way to low Earth orbit aboard the NASA Materials International Space Station Experiment 11 mission in 2019. EDS technology was embedded in 12 different panels made of glass, polyimide, and prototype spacesuit fabric and sent to the International Space Station for testing in the vacuum of space.
Before making it to space, EDS had been predominantly tested in vacuum chambers that produced promising results of removing simulants and samples of lunar regolith, collected during NASA’s Apollo missions, from surfaces within a second.
Most recently, as part of Intuitive Machines’ first lunar lander mission, EDS technology was embedded in two lenses of EagleCam, a CubeSat camera system developed by students at Embry Riddle Aeronautical University in Daytona Beach, Florida. Following landing, the EagleCam instrument successfully deployed from Intuitive Machines’ Odysseus lander. The teams at Embry Riddle were unable to acquire images of the lander as they had hoped, but they were able to collect other data sets, including from the EDS technology.
Later this year, another EDS technology demonstration is slated to land on the Moon as part of NASA’s CLPS initiative mission with commercial partner Firefly Aerospace.
“The team has put in a tremendous amount of work and dedication. EDS is considered the leading technology and the best we have for the removal of dust for space applications,” Buhler said. “To fly as a dedicated payload on a mission to the Moon is very exciting.”
According to Buhler, EDS technology could be a first line of defense for establishing an extended human presence on the Moon with future Artemis missions.
From its applications with protecting tools, machinery, and spacesuits, the technology could potentially even help improve day-to-day tasks by being applied to small components like gaskets, seals, and hatches. This could save astronauts the hassle of traveling to the Moon with extra cleaning supplies.
“EDS technology can be used outside of a habitat to help clean surfaces like railings and floors, but it can be used inside as well,” Buhler said. “All of those applications are being evaluated and tested.”
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The post Plan Now for the 2026 Total Solar Eclipse in Europe appeared first on Sky & Telescope.
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