balloon astronomy axtaršenâsi bâ bâlon, bâlon-axtaršenâsi Fr.: astronomie en ballon A branch of modern astronomy in which balloons are used to carry telescopes and instruments to high altitudes (up to 50 km) for observation. Balloon, from Fr. ballon, from It. dialectal ballone, augmentative of balla, ball, from P.Gmc. *ball-, from PIE *bhel- "to blow, swell". → astronomy. Axtaršenâsi, → astronomy; bâlon, from Fr. ballon. |