“variable star”的概念、定义、习题解题方法及翻译-物理辞典

单词	variable star
释义	variable star A star that varies in brightness (see luminosity). This variation, which can be regular or irregular, can be due either to changes in internal conditions (an example of this being a pulsating star in which the variation in brightness is due to the star expanding and contracting) or due to external reasons, such as a star being eclipsed by another star (or stars). Changes in brightness of a star occur both in its early stages and close to its death. Examples of variable stars are nova and supernova. Observations of variable stars provide important information concerning the mass, size, structure, temperature, and evolution of stars. There are more than 25 000 variable stars known, some of which can be seen with the naked eye. The time-scale from maximum to minimum brightness varies from less than a second to a few years
随便看	Stirling engine STM stochastic process stokes Stokes' law Stokes' parameters Stokes' theorem Stokes, Sir George Gabriel stop stopping power storage ring strain strain gauge strain hardening strange attractor strange matter strangeness stratosphere streamline flow stress string stroboscope strong interaction structure formation in the universe subatomic particle

物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。