Here's the scenario: a single collision in low Earth orbit triggers a cascade of debris that makes entire orbital shells unusable for generations. This is the Kessler Syndrome -- and it's not hypothetical. The Equitable and Sustainable Access to Space module includes the ESA's explanation of the phenomenon, a World Economic Forum white paper on debris removal, and a March 2026 Guardian interactive piece on how a satellite-smashing chain reaction could spiral out of control. It also covers space law fundamentals from UNOOSA, including free e-learning courses on international space law. If your concept touches orbital sustainability, spectrum governance, or the long-term accessibility of space, start here. Learning Resources tab -- deadline July 19.