1. (astronomy) a technique that uses radar echoes to examine bodies within the solar system, obtaining information about size, shape, topography, surface density, spin etc.

Encyclopedia: Radar astronomy

• radiation pattern
• radiation pressure
• radiation pyrometer
• radiation sickness
• radiation syndrome
• radiation therapy
• radiative
• radiator
• radiator cap
• radiator grille
• radiator hose
• radical
• radical cell
• radical chic
• radical hysterectomy
• radical mastectomy
• radical sign
• radicalise
• radicalism
• radicalize
• radically
• radicchio
• radicle
• radicular
• radiculitis