英语释义

1. the type of a star described primarily according to its surface temperature by means of alphabetic categories (such as O, B, A, F, G, K, and M), decimal subdivisions of the categories, and sometimes symbols indicating special characteristics (such as e for stars with bright emission lines, d for dwarfs, and g for giants)
Our Sun is classified as a spectral type G2. Note: Historically, these classes were based on the spectral lines of stars as observed by astronomers. Over time the classes were rearranged according to temperature instead of spectrum, taking them out of their former alphabetic order, but scientists kept using the term “spectral” to describe the system.

片语

spectral type diagram光谱型图

spectral line type谱线线形

spectral type curve谱型图

spectral type of star光谱型

early spectral type早光谱型

Star Spectral Type谱类型

spectral class or type光谱型

doppler spectral type多普勒谱型

spectral type of stars[天]

英汉例句

• the spectral type was similar to that of a giant of f type during this period.

  整个观测期间该星光谱型基本与f型巨星相近。

• the appearance of the different spectral type for white dwarfs depends mainly on the difference in temperature and internal mixing degree.

  白矮星不同光谱型的表现，主要是由于温度的不同和内部混搅程度的不同引起的。

• it is obvious that there is spectral type effect in astronomical refraction.

  天文折射中包含有显着的光谱型效应。

• a complete mk designation includes both spectral type and luminosity class —for instance, the sun is a g2v.

  一个完整的mk系统代号包含光谱类型和光度型两部分——例如，太阳属于g2v类恒星。