Laser‑driven graphene aerogels show strong propulsion in ESA microgravity tests
A recent European Space Agency (ESA) parabolic flight has demonstrated that graphene aerogels can be efficiently propelled by laser light in microgravity, highlighting a promising route for fuel‑free space propulsion. In near‑weightlessness, ultralight graphene aerogel cubes (density around 0.01 g/cm³) accelerated “faster than a blink” when illuminated with a laser, while under normal Earth gravity the same samples showed only minimal motion.
During the microgravity phases, the aerogels travelled about 50 mm in a few hundredths of a second and reached peak velocities of around 1.7 m/s, with a short thrust pulse on the order of 0.6 mN. On the ground at 1 g, displacement was limited to roughly 15 mm, velocities stayed near 0.06 m/s, and the thrust dropped to only a few tens of µN. This clearly shows that gravity and surface friction had been hiding most of the material’s light‑driven performance in previous lab measurements.