T-Mobile Wi-Fi 1:03 PM instructure-uploads.s3.amazonaws.com . ASTRONOMY 105 Data
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T-Mobile Wi-Fi 1:03 PM instructure-uploads.s3.amazonaws.com . ASTRONOMY 105 Data Sheet Procedure 2b: Other Stars Spectral Types Star No. Abs. Mag. Sp. Type Star No. Abs. Mag. Sp. Type +2.9 21 2. 23 28 30 +0.8 +3.1 17 +3.3 0.0 0.8 Procedure 3: Apparent Magnitude, Absolute Magnitude, and Distance a) is the absolute magnitude of an A0 main sequence star of apparent magnitude +6. is the distance to this star b) If the above star was really a supergiant, then is its absolute magnitude (M) and is its distance c) The brighter star is a Part II Using the Internet, answer the following questions: 1, What is the definition of apparent magnitude? 2. What is the definition of absolute magnitude? 3. Who is credited with thinking up the idea of magnitudes to measure the brightness of stars? 4. What can spectral lines be used for?Explanation / Answer
1. Apparent Magnitude measures the brightness of a star as it appears to an observor on Earth. It is designated by the letter m.
2. Absolute Magnitude is a logarithmic scale and it measures the luminosity of a celestial object. It is designated by M. It is measured by assuming that the celestial object is placed at a distance of 10 parsecs from the Earth.
4. Spectral Lines give us an idea of the element present in a star and also the temperature and density of the element.
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