radar astronomy
noun
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.
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a person who acts as though he or she knows everything and who dismisses the opinions, comments, or suggestions of others.
a person who spends possessions or money extravagantly or wastefully; spendthrift.
a well-intentioned but naive and often ineffectual social or political reformer.
TAKE THE QUIZ TO FIND OUTOrigin of radar astronomy
First recorded in 1955–60
Words nearby radar astronomy
racquetball, racy, rad, RADA, radar, radar astronomy, radar beacon, radar gun, radarkymography, radarman, radar picket
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for radar astronomy
radar astronomy
noun
the use of radar to map the surfaces of the planets, their satellites, and other bodies
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Scientific definitions for radar astronomy
radar astronomy
The scientific study of nearby astronomical objects by reflecting microwaves off the objects and analyzing the echoes. The techniques of radio astronomy can be tailored to answer specific questions, such as the rotation period of the inner planets and the Moon. They have has also been used to test General Relativity, measure distances and features of planets in the solar system, and determine the composition, position, and spin of asteroids.
The American Heritage® Science Dictionary
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