DC 1.docx - Astronomy 100 Unit 1 Discussion Questions 1 State three properties(there are more than three of any visible object in the universe(such as a

DC 1.docx - Astronomy 100 Unit 1 Discussion Questions 1...

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Astronomy 100, Unit 1 Discussion Questions 1. State three properties (there are more than three) of any visible object in the universe (such as a star) that one can determine by spectroscopy (measurement of light intensity & spectra at all wavelength). Explain how to determine each of these properties from a measured spectrum. First of all, people can identify the surface temperature of a star based on the spectrum curve shape. Secondly, people can identify radial velocity based on the Doppler shift of spectral lines relate to laboratory spectra. Thirdly, people can identify the elemental composition based on the
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