A speck of just a few millimeters can become a deadly threat when it travels through space at speeds of several kilometers per second. It doesn’t have to be a runaway satellite or a rocket fragment: a small piece of metal, a splinter or even a piece of paint is enough to endanger a spacecraft. And there are many. According to NASAnearly 45,000 larger than 10 cm, approximately 1.2 million fragments between 1 and 10 cm, and more than 140 million particles smaller than 1 cm.
Faced with this invisible threat, the American company Atomic-6 proposes a solution that is reminiscent of armor: a composite material capable of absorbing impacts at extreme speeds without turning the crash into a new cloud of fragments. Its technology, named Space Armorhas just taken a decisive step. On October 20, it traveled to space for the first time installed on Starburst-1, a Portal Space Systems ship launched by a SpaceX Falcon 9 rocket. It is not yet a shield whose effectiveness has been demonstrated against real impacts in orbit. The mission will allow us to check how the material behaves in the environment for which it was designed. But it comes after Pass laboratory tests at extraordinary speeds.
Until now, one of the most used solutions to protect ships has been the Whipple shield, developed in the mid-20th century by astronomer Fred Whipple. Its principle is simple: a first metal sheet, separated from the wall of the ship, breaks the projectile that hits it. By fragmenting and dispersing, the particle distributes its energy before reaching the structure it must protect.. It is an effective solution, but it adds weight and bulk and, as a result of impact, can produce secondary fragments.
Atomic-6 wants to change that strategy. Instead of relying on multiple metal layers that disintegrate the projectile, Space Armor It uses a composite material manufactured through its own process that combines fibers and resin. The company maintains that its structure absorbs the impact and limits the expulsion of new dangerous fragments. The difference is important: it is not enough to protect a satellite from a collision; It is also necessary to prevent this collision from contributing to multiplying the objects that threaten the rest of the ships.
The design has another advantage. The parts are modular and can be installed on different surfaces of the space vehicle. Additionally, the material allows radio waves to pass through, so it can protect communications equipment without blocking signals. That feature opens the possibility of using it in areas where metal shielding could interfere with the antennas.
Tests carried out on land offer promising results. According to Atomic-6, its plates withstood impacts from three-millimeter aluminum projectiles fired at more than seven kilometers per second, about 25,200 kilometers per hour, without generating harmful secondary fragments. The company develops different versions: Space Armor Litedesigned for particles up to three millimeters, and Space Armor Maxdesigned for impacts of up to 12.5 millimeters. The latter represents a more demanding protection objective and should not be confused with the capacity demonstrated by the tested version.
Arriving in Earth orbit will allow us to verify something that ground tests cannot completely reproduce: the behavior of the material during a real space mission. Atomic-6 even hopes that the ship will receive some impact that can be recorded by the onboard camera and data. Only then can you evaluate how the armor responds under operational conditions.
The challenge is increasingly urgent. If two objects collide in orbit, they can produce thousands of fragments that, in turn, collide with other satellites. This chain reaction, known as Kessler syndrome, could increase the risk for certain orbital regions and make future missions more difficult. Shielding does not eliminate space debris or replace measures to prevent it from being generated, but it can help protect infrastructure. on which communications, navigation and Earth observation depend. In space, the most effective armor is not necessarily the thickest. It is the one that manages to stop an almost invisible threat without adding new ones to the environment. And that is Atomic-6’s bet: to protect the satellites without fueling the problem from those who try to defend them.