Characteristics of Stars. Star Definition Star – A body of gases consisting mainly of hydrogen and...
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Transcript of Characteristics of Stars. Star Definition Star – A body of gases consisting mainly of hydrogen and...
![Page 1: Characteristics of Stars. Star Definition Star – A body of gases consisting mainly of hydrogen and helium that gives off a tremendous amount of energy.](https://reader033.fdocuments.net/reader033/viewer/2022042821/56649f455503460f94c6634e/html5/thumbnails/1.jpg)
Characteristics of Stars
![Page 2: Characteristics of Stars. Star Definition Star – A body of gases consisting mainly of hydrogen and helium that gives off a tremendous amount of energy.](https://reader033.fdocuments.net/reader033/viewer/2022042821/56649f455503460f94c6634e/html5/thumbnails/2.jpg)
Star Definition
• Star – A body of gases consisting mainly of hydrogen and helium that gives off a tremendous amount of energy (electromagnetic radiation)
![Page 3: Characteristics of Stars. Star Definition Star – A body of gases consisting mainly of hydrogen and helium that gives off a tremendous amount of energy.](https://reader033.fdocuments.net/reader033/viewer/2022042821/56649f455503460f94c6634e/html5/thumbnails/3.jpg)
Star Color – Depends upon surface temperature
Blue stars – above 30,000 CWhite stars – 8,000 - 11,000 CYellow stars – about 5,550 C (sun) Orange stars – about 4,000 CRed stars – about 3000 C
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Star Color
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Star Size
• Vary from dwarf stars (size of the earth) to super giants that are 1000 times bigger than sun
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Star sizes
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Brightness of stars (magnitude)
Absolute Magnitude – true brightness of a star – Depends upon temperature and size
Apparent magnitude – brightness of a star as viewed from earth. Depends upon temperature, size, and distance to earth
![Page 8: Characteristics of Stars. Star Definition Star – A body of gases consisting mainly of hydrogen and helium that gives off a tremendous amount of energy.](https://reader033.fdocuments.net/reader033/viewer/2022042821/56649f455503460f94c6634e/html5/thumbnails/8.jpg)
Absolute magnitude
![Page 9: Characteristics of Stars. Star Definition Star – A body of gases consisting mainly of hydrogen and helium that gives off a tremendous amount of energy.](https://reader033.fdocuments.net/reader033/viewer/2022042821/56649f455503460f94c6634e/html5/thumbnails/9.jpg)
Classification of Stars – Hertzsprung-Russell (H-R) diagram – Comparison of absolute magnitude and temperature of stars.
• Main Sequence -most common star – (sun)
• Red Giants - very large, cool bright star• Supergiants - extremely large bright star• White dwarf – small, hot, dim star
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H-R Diagram