| 单词 |
wilson-bappu effect |
| 释义 |
Wilson-Bappu effect
Wilson-Bappu effect[′wil·sən ′bä·pü i‚fekt] (astronomy) A linear relation between the absolute magnitudes of late-type stars and the width of the K2 emission core in the resonance line of ionized calcium (CaII) at a wavelength of 3933 nanometers. |
| 随便看 |
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