出典:Wiktionary
出典:『Wiktionary』 (2024/11/28 00:31 UTC 版)
From weightless + -ness.
weightlessness (usually uncountable, plural weightlessnesses)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/30 06:49 UTC 版)
Weightlessness (or zero-g) is the condition that exists for an object or person when they experience little or no acceleration except the acceleration that defines their inertial trajectory, or the trajectory of pure free-fall. The physical path of an inertial trajectory depends only on the direction and strength of the sum of the gravitational attractions outside of the inertial reference frame.
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弱々しいこと
the state of something being weightless
むだなこと