apparent magnitude

名词 n.
中文释义

英文释义

名词 n.
  1. a numerical measure of the brightness of a star, planet etc.; a star with apparent magnitude 0 gives an illuminance of 2.54 microlux just outside the earth's atmosphere, or 82% of that (2.08 microlux) under clear skies, and every increase of 1 unit represents a decrease in the light received by a factor of 2.512. countable,uncountable

词形变化

apparent magnitudes plural
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