A tiny fragment of paint, lighter than a grain of rice, damaged the window of the space shuttle during the STS-92 mission. NASA engineers identified the culprit as a paint chip from another spacecraft, traveling at a speed so high that it could turn dust into a destructive projectile. The impact left a 10 mm wide and 1.9 mm deep crater on the shuttle’s central port-side window. Analysis using a scanning electron microscope and energy-dispersive X-ray spectroscopy confirmed the damage was caused by orbital debris—space debris, such as paint chips or fragments from defunct satellites. As a result, the window had to be replaced. The speed at which objects move in low Earth orbit—about 28,000 km/h or 8 kilometers per second—is essential for maintaining their orbit and avoiding reentry into Earth’s atmosphere. When two objects travel on intersecting paths, their relative speed can exceed this significantly. At these velocities, the kinetic energy of even a small fragment increases dramatically with speed. For instance, doubling the speed of an object quadruples its energy. This immense energy can vaporize metal at the point of impact, creating craters larger than the fragment itself. A fragment weighing just a few grams can behave like a heavy projectile at these speeds. NASA has documented numerous instances of such damage. For example, a debris particle only 1.6 millimeters in size, moving at about 9 kilometers per second, pierced a radiator panel on a shuttle and reached the cargo bay door. Another impact left a hole on a panel, with analysis suggesting the culprit was a paint chip no larger than 0.2 millimeters. These incidents are not unique to shuttles; the International Space Station (ISS) has also suffered similar damage. In 2016, British astronaut Tim Peake photographed a chip on one of the ISS's observation dome windows, which he described as a clear sign of debris impact. He noted the window was "quadruple glazed," meaning it had multiple layers to protect the pressurized cabin. This layered design is not for comfort but for safety. The multiple layers of glass absorb and disperse the energy of an impact, reducing the risk to the crew. A fragment that breaks through the first layer loses energy and is weakened before reaching subsequent layers. This principle, borrowed from spacecraft shielding, ensures that even potentially catastrophic impacts may result in only minor surface damage. Space agencies track about 35,000 objects larger than 10 centimeters in low Earth orbit, but this number represents only a fraction of the actual debris. According to the European Space Agency, there are more than one million objects larger than one centimeter in orbit—enough to cause catastrophic damage. These smaller objects cannot be individually tracked, yet they travel at the same high speeds as the larger tracked objects, making them equally dangerous. As a result, space agencies must frequently adjust the trajectories of satellites and crewed vehicles to avoid collisions. These maneuvers, while routine, consume valuable fuel and can disrupt scientific operations. The growing amount of debris in orbit raises concerns about the Kessler syndrome—a scenario where collisions create more debris, leading to a chain reaction that increases the risk of further collisions. While some debris eventually burns up in the atmosphere, others remain in orbit for centuries, creating permanently congested zones. This risk underscores the urgent need for better debris management and mitigation strategies as space activity continues to increase.