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radar astronomy
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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.
Origin:
1955–60
1955–60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Link To radar astronomy
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Radar astronomy
is always a great word to know.
So is interrobang. Does it mean:
| a scrap or morsel of food left at a meal. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
Collins
World English Dictionary
| radar astronomy | |
| —n | |
| the use of radar to map the surfaces of the planets, their satellites, and other bodies | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
| 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
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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