Astr 12160 midterm Study guides, Class notes & Summaries
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ASTR 121|60 MIDTERM—ALBRIGHT Quiz Questions Well Solved|2024/2025
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absolute magnitude - ️️The actual brightness of a star 
 
absorption line spectrum - ️️A cloud of gas between us and a light bulb can absorb light of specific wavelengths, leaving dark absorption lines in the spectrum 
 
apparent magnitude - ️️the brightness of a star as seen from Earth 
 
arcminute - ️️1/60 of a degree 
 
arcsecond - ️️1/3600 of a degree 
 
blue shift - ️️the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial o...
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