Term
| What color are stars with the highest surface temperature ? |
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Definition
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Term
| What color are the stars with the coldest surface temperature ? |
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Definition
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Term
| How do astronomers determine the mass of a star ? |
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Definition
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Term
What is the magnitude associated with the brightest star ? |
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Definition
| -20 ;; The lesser the number, the brighter |
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Term
| What affects the star's apparent magnituede ? |
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Definition
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Term
What is apparent magnitude? |
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Definition
| How bright the star appears from earth |
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Term
| What is a light year ? How many kilometers is a light year ? |
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Definition
| A light year is the distance time travels in a year ;; 9.5 trillion km in one light year |
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Term
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Definition
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Term
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Definition
| How we measure distance of stars |
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Term
| What does parallax measure ? |
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Definition
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Term
| When is parallax not used ? |
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Definition
| When the star is too far away |
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Term
| How are stellar distances usually expressed ? |
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Definition
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Term
| What are the types of nebulae ? |
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Definition
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Term
| What causes the difference in the brightness of 2 stars when they have the same surface temperature ? |
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Definition
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Term
| What color main-sequence stars are the most massive ? What color are the main sequence stars that are the least massive ? |
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Definition
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Term
| What does a HR diagram show the relationship between ? |
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Definition
| absolute magnitude and temperature |
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Term
| Roughly what percentage of stars on the HR diagram are main-sequence stars ? |
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Definition
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Term
| What is another name for the interstellar matter that will eventually form a star ? |
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Definition
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Term
| When is a star said to be " born " ? |
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Definition
| When the core of the protostar reches 10 million kelvin |
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Term
| What is the force most responsible for the formation of a star ? |
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Definition
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Term
| How do massive stars end their lives ? |
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Definition
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Term
| What galaxy does or sun belong, what type of galaxy is it, and where in that galaxy is the sun located ? |
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Definition
| Milky way ;; Spiral galaxy ;; On the arms |
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Term
| What can't light escape ? |
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Definition
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Term
| What do all stars eventually run out of ? What occurs when that happens ? |
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Definition
| Hydrogen ;; Becomes a giant |
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Term
| What do the nuclear reactions in the core of a Red Giant convert helium to ? |
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Definition
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Term
| Before being engulfed, what happens to the matter that is pulled into a black hole ? |
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Definition
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Term
| What does a main-sequence star become after it has worn out the fuel in its core ? |
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Definition
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Term
| What type of star is our sun ? |
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Definition
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Term
| What will the next stage of our sun be ? |
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Definition
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Term
| What will be the final stage in the sun's life cycle ? |
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Definition
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Term
| What are 60% of all known galaxies classified as ? |
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Definition
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Term
| What is the largest object ? |
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Definition
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Term
| What indicates that the universe is expanding ? |
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Definition
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Term
| According to the big bang theory, when did the universe begin ? |
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Definition
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Term
| What are patterns of stars called ? |
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Definition
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Term
| What were constellations originally named in honor of ? |
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Definition
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Term
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Definition
| Beginning of stars life . Developing star, not hot enough to behin nuclear fusion . |
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Term
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Definition
| Flickering stars that release radio images |
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Term
| What are the most dense stars ? |
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Definition
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Term
| What marks the beginning of the universe ? |
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Definition
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Term
| What is the doppler effect ? When there is a greater shift in the spectra, what does it mean ? |
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Definition
| When the frequency and wavelength of sound waves are effected by relative motion ;; The object is moving faster |
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Term
| Name three major differences among galaxies . |
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Definition
| Size, color, shape, amount of stars |
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Term
| How much time of an average size stars life is spent in the main sequence stage ? |
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Definition
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Term
| When you know the color of a star, you can then find what property ? |
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Definition
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Term
| Why are massive stars lives faster than stars that are less massive ? |
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Definition
| More hydrogen, which is burned quicker |
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Term
| Why are red giants red colored in appearence ? |
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Definition
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Term
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Definition
| Groups of stars, dusts, and gases held together by gravity |
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Term
| Which galaxies contain mainly young stars ? |
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Definition
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Term
| What does hubble's law state? |
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Definition
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Term
| What proves the universe is expanding ? |
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Definition
| Cosmic background radiation // shift to red |
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