“nebula”的概念、定义、习题解题方法及翻译-物理辞典

单词	nebula
释义	nebula Originally a fixed, extended, and somewhat fuzzy white haze observed in the sky with a telescope. Many of these objects can now be resolved into clouds of individual stars and have been identified as galaxies. They are still sometimes referred to as extragalactic nebulae . The gaseous nebulae , however, cannot be resolved into individual stars and consist, for the most part, of interstellar dust and gas. In some of these gaseous nebulae the gas atoms have been ionized by ultraviolet radiation from nearby stars and light is emitted as these ions interact with the free electrons in the gas. These are called emission nebulae . In the dark nebulae , there are no nearby stars and these objects are consequently dark; they can only be detected by what they obscure
随便看	molar molar conductivity molar heat capacity molar latent heat molar volume mole mole fraction molecular beam molecular distillation molecular flow molecular formula molecular orbital molecular sieve molecular volume molecular weight molecule moment of a force moment of inertia momentum momentum space monochromatic radiation monochromator monoclinic Monte Carlo simulation moon

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。