BUDAPEST, June 25 (Xinhua) -- Researchers from the Budapest University of Technology and Economics, in partnership with the Hungarian Research Network, unveiled a newly designed geometric object on Wednesday that may inspire innovative spacecraft landing technologies.
The object, a precisely engineered tetrahedron, has a unique physical property: no matter how it is placed on a flat surface, it always returns to the same face. This behavior, reminiscent of a roly-poly toy, confirms a mathematical idea proposed in 1984 by British mathematician John Conway, which had remained unrealized until now.
The project was led by Hungarian architecture student Gergo Almadi and Professor Gabor Domokos, a mathematician and co-discoverer of the Gomboc, a mono-monostatic body with a single point of equilibrium. The international research effort also included Professor Robert Dawson of Saint Mary's University in Halifax, Canada.
The new tetrahedron, nicknamed "Bille," was constructed using ultralight carbon-fiber tubes and a tungsten-carbide core to create the required mass imbalance. Its self-righting ability was demonstrated to journalists at the university on Wednesday.
"This is more than a mathematical curiosity ... The principles behind this object could help engineers design landers that naturally return to an upright position," Domokos said, citing the tipping of three recent lunar landers from Japan and the United States on the Moon's surface.
"Unlike a theoretical proof, this model works in the real world," he added. "And that's what makes it truly valuable." ■
