Canatu and the European Space Agency (ESA) have signed a contract to develop an optical blocking filter using a unique carbon nanotube (CNT)-based support structure and investigate its applicability for the ATHENA (Advanced Telescope for High Energy Astrophysics) telescope. The optical blocking filter is designed to let x-rays pass through whilst blocking out other wavelengths, enabling precise imaging of celestial objects. Such filters are extremely fragile, so they are typically provided wi...