Term
| Which of this is the most important indicator of how a star will ‘evolve’ |
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Definition
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Term
| The total amount of energy that a start emits is called its ______. |
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Definition
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Term
| You are observing two stars with the same luminosity. Star A is 5 light years from the earth; star B is 50 light years. What result do you expect for their brightness’s? |
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Definition
| The brightness of A will be greater than B. |
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Term
| Locate on the H-R Diagram: Stars about as large as the planet earth. |
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Definition
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Term
| Locate on the H-R Diagram: Stars about as large as the planet earth. |
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Definition
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Term
| During the horizontal branch phase of its life, a star fuses: |
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Definition
| helium to carbon in its core |
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Term
| On the H-R diagram: what is the correct quantity for the vertical axis? |
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Definition
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Term
| High mass stars are those above _____ solar masses. |
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Definition
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Term
| 8. The part of the Sun we see is called _______. |
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Definition
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Term
| What is the heaviest element that the most massive stars can produce in their cores during their normal lives? |
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Definition
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Term
| Which event marks the ‘birth’ of a star? |
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Definition
| --Fusion of hydrogen atoms into helium atoms. |
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Term
| A stellar remnant with a mass below the Chandrasekhar limit becomes a _____. |
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Definition
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Term
| Most low mass, red stars in our neighborhood. |
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Definition
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Term
| For a large sampling of stars, most stars would be |
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Definition
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Term
| The plot of luminosity vs. temperature is known as the _______. |
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Definition
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Term
| . The sunspot cycle is ______. |
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Definition
| half the time of the solar cycle |
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Term
| A property that can be computed direct from the luminosity and surface temperature of a star. |
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Definition
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Term
| Stars that change in luminosity by pulsating in and out are called |
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Definition
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Term
| The sun does not expand or contract as it is in a state of |
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Definition
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Term
| _____________ are small bright dead core stars like our sun |
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Definition
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Term
| What is the only way that a white dwarf star can explode? |
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Definition
| if it is in a binary star system |
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Term
| Locate on the H-R diagram: The least massive young stars |
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Definition
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Term
| The sun is expected to live about ______ years. |
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Definition
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Term
| Red giants like betelguese are where on the HR diagram? |
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Definition
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Term
| Locate on the H-R diagram: The vast majority of young bright blue naked eye stars |
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Definition
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Term
| Binary stars are used to measure_________. |
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Definition
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Term
| When possible the luminosities of stars can be directly determined from: |
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Definition
| the measured brightness and the distance to the start |
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Term
| Two important characteristics of sunspots are: |
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Definition
| low temperature and intense magnetic fields |
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Term
| A supernova type ____ is from a white dwarf explosion. |
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Definition
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Term
| . The study of waves inside the sun is called ______. |
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Definition
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Term
| Chandrasekhar limit is about _____ times the mass of our sun. |
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Definition
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Term
| The hotter the star, the bluer it is, is called __________. |
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Definition
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Term
| Locate on the H-R diagram: Sirius B, the hot white dwarf only 1/1000th as luminous as the sun |
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Definition
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Term
| A star 10 times the mass of the sun may end up a neutron star. |
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Definition
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