the branch of astronomy that uses radar to map the surfaces of planetary bodies, as the moon and Venus, and to determine periods of rotation.
[ 1955-60 ]
the branch of astronomy that uses radar to map the surfaces of planetary bodies, as the moon and Venus, and to determine periods of rotation.
[ 1955-60 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012