Astrophysics - Definitions from Dictionary.com

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

as·tro·phys·ics

Audio Help [as-troh-fiz-iks] Pronunciation Key

–noun (used with a singular verb

)

the branch of astronomy that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in the interior of celestial bodies and in interstellar space.

[Origin: 1885–90; astro- + physics

]

—Related forms

as·tro·phys·i·cal, adjective

as·tro·phys·i·cist

Audio Help [as-troh-fiz-uh-sist] Pronunciation Key, noun

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
Astrophysics

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American Heritage Dictionary - Cite This Source - Share This

as·tro·phys·ics Audio Help (ās'trō-fĭz'ĭks) Pronunciation Key
n. (used with a sing. verb)
The branch of astronomy that deals with the physics of stellar phenomena.

as'tro·phys'i·cal adj., as'tro·phys'i·cist (-fĭz'ĭ-sĭst) n.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

WordNet - Cite This Source - Share This

astrophysics
noun
the branch of astronomy concerned with the physical and chemical properties of celestial bodies

The American Heritage Science Dictionary - Cite This Source - Share This

astrophysics Audio Help (ās'trō-fĭz'ĭks) Pronunciation Key
The branch of astronomy that deals with the physical and chemical processes that occur in stars, galaxies, and interstellar space. Astrophysics deals with the structure and evolution of stars, the properties of interstellar space and its interactions with systems of stars, and with the structure and dynamics of clusters of stars such as galaxies.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
astrophysics

The branch of astronomy devoted to the study of the physical characteristics and composition of objects in the sky. Typical concerns of astrophysics are how much light the stars give off and the size, mass, and temperature of planets and stars.

[Chapter:] Physical Sciences and Mathematics

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Astrophysics

As`tro*phys"ics\, n. [Astro- + physics.] (Astron.) The science treating of the physical characteristics of the stars and other heavenly bodies, their chemical constitution, light, heat, atmospheres, etc.

Note: Its observations are made with the spectroscope, bolometer, etc., usually in connection with the telescope.

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