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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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96-99.9% of stars mass is made up of? |
Hydrogen and Helium |
H&H |
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How might Hertzsprung - Russell diagrams be used? |
Determine a star's absolute brightness, temperature, or color. |
There are three. |
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Label a-d. |
A. Surface Temp. B. Absolute Brightness C. Main Sequence D. Super Giants |
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How does a white dwarf compare to the brightness of the main sequence stars? |
They are smaller and duller. |
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5 star properties include: |
Brightness, Temp., Color, Size, Mass, & Color. |
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How many kilometers is a light year? |
9.5 trillion. |
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What is the distance that light travels in a vacuum in a year? |
One light year. |
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What is the apparent change in position of an object with respect to a distant background? |
A parallax. |
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Astronomers measure the parallax of a nearby star to find it's...? |
Distance from Earth. |
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List the properties of which astronomers use to classify stars: |
1. Brightness 2. Color 3. Size |
There are three. |
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The brightness of a star as it appears from Earth is called what? |
Apparent Brightness. |
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What can be used to identify different elements in the star? |
A spectrograph. |
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