| 单词 | f stars |
| 释义 | F starsF starsStars of spectral type F that are white with a surface temperature (T eff) of about 6000 to 7400 kelvin. The hydrogen lines in the spectrum weaken rapidly and the lines of ionized calcium (Ca II, H and K) strengthen from F0 to F9; there are many lines of neutral and singly ionized metals and heavy atoms. Canopus, Polaris, and Procyon are F stars. |
| 随便看 |
|
英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。