请输入您要查询的字词:

 

单词 Helmholtz–Kelvin contraction
释义
Helmholtz–Kelvin contraction

Astronomy
  • The contraction of a star under gravity, the potential energy thus lost being converted into heat and radiated away. The Helmholtz–Kelvin contraction time-scale is defined as the time it would take for a star to collapse if nuclear burning were switched off and it continued to radiate at the same luminosity. For the Sun this time would be about 30 million years. It is named after the German scientist Hermann Ludwig Ferdinand von Helmholtz (1821–94) and Lord Kelvin.


随便看

 

科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。

 

Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号 更新时间:2024/12/26 0:24:47