open universe

SEE SYNONYMS FOR open universe ON THESAURUS.COM

noun Astronomy.

a model of the universe in which the universe expands forever because there is not enough mass to counteract the expansion by means of gravitational attraction.

Compare closed universe.

Origin of open universe

First recorded in 1975–80

Words nearby open universe

open the door to, open-timbered, open trailer, open tuberculosis, open union, open universe, Open University, open up, open verdict, open-web, open with

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Cultural definitions for open universe

open universe

If there is not enough matter in the universe to exert a strong enough gravitational force to stop the universal expansion associated with the big bang, the universe is said to be open. (Compare closed universe and flat universe.)

Scientific definitions for open universe

open universe

Model of the universe in which the curvature of space is flat or curved away from itself, entailing that the size of the universe is infinite. According to this model, gravity between objects is not able to stop or reverse the expansion of the universe, thus objects continue to move farther and farther apart as space moves outward. An object moving in a straight line in an open universe would never return to its starting point. According to current cosmological theories, the universe is open if it is insufficiently dense. Such a universe will never end, but will eventually become very cold and dark because stars gradually lose all of their energy. Compare closed universe. See Note at big bang.

单词	open universe
释义	open universe SEE SYNONYMS FOR open universe ON THESAURUS.COM noun Astronomy. a model of the universe in which the universe expands forever because there is not enough mass to counteract the expansion by means of gravitational attraction. Compare closed universe. Origin of open universe First recorded in 1975–80 Words nearby open universe open the door to, open-timbered, open trailer, open tuberculosis, open union, open universe, Open University, open up, open verdict, open-web, open with Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Words related to open universe inflationary universe Cultural definitions for open universe open universe If there is not enough matter in the universe to exert a strong enough gravitational force to stop the universal expansion associated with the big bang, the universe is said to be open. (Compare closed universe and flat universe.) The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Scientific definitions for open universe open universe Model of the universe in which the curvature of space is flat or curved away from itself, entailing that the size of the universe is infinite. According to this model, gravity between objects is not able to stop or reverse the expansion of the universe, thus objects continue to move farther and farther apart as space moves outward. An object moving in a straight line in an open universe would never return to its starting point. According to current cosmological theories, the universe is open if it is insufficiently dense. Such a universe will never end, but will eventually become very cold and dark because stars gradually lose all of their energy. Compare closed universe. See Note at big bang. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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open universe

noun Astronomy.

Origin of open universe

Words nearby open universe

Words related to open universe

Cultural definitions for open universe

Scientific definitions for open universe