Term
| Which statement about stellar motion is incorrect |
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Definition
| Proper motion is measured in intervals of 6 months |
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Term
| A star has a parallax of 0.01 arc seconds. Its distance is |
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Definition
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Term
| If Vega is apparent magnitute zero and Debeb first magnitude then |
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Definition
| Vega is 2.5x brighter than Deneb |
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Term
| A star's absolute magnitude is its aparent brightness as seen from |
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Definition
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Term
| Two stars both have parallaxes of 0.023 inches but star A has an apparent magnitude of 2.3 while star B has a magnitude of 7.3. Which statement is true |
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Definition
| Star A is both 100x brighter and more luminous than star B |
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Term
| What physical property of a star does the spectral type measure? |
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Definition
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Term
| Which star would be the hottest? |
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Definition
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Term
| What can be said with certainty about a red star and a blue star? |
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Definition
| The blue star is hotter than the red star |
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Term
| Compared to type A0 star, a type A9 star |
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Definition
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Term
| The star's color index is a quick way of determining its |
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Definition
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Term
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Definition
| temperature vs. luminosity |
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Term
| In the H-R diagram, what are the two most important types of data plotted? |
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Definition
| spectral classes and absolute magnitudes |
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Term
| On the H-R diagram, the Sun lies |
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Definition
| about the middle of the main sequence |
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Term
| On the H-R diagram, white dwarfs lie |
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Definition
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Term
| On the H-R diagram, red supergiants lie |
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Definition
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Term
| A star near the lower right of the H-R diagram is likely to be |
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Definition
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Term
| The Doppler shift is used to find |
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Definition
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Term
| Which type of binary do we get by information about looking at the intensity of light |
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Definition
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Term
| Binary stars separated enough to be resolved in a telescope are called |
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Definition
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Term
| The apparent angular movement of a nearby star against the background stars as a consequence of its motion in space is known as |
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Definition
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Term
| The speed of a star, measured in a direction perpendicular to the line of sight from the Earth to the star, is known as |
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Definition
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Term
| Suppose that 2 identical stars are located such that star A is at a distance of 5pc ad star B is at a distance of 25pc. How will star B appear to star A |
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Definition
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