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| The limitation to the size of the objective of a refracting telescope is due to |
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| The most important function of the astronomical telescope is |
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| Percival Lowell had an observatory built near Flagstaff, AZ so he could study the planet |
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| The person to use the telescope for scientific investigation was Galileo. T or F? |
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| The 11 year sunspot cycle is based on the number of sunspots only. T or F? |
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| Prominences are formed near (2)... |
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| sunspot groups AND active regions of the sun |
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| A solar magnetic cycle takes, on average, this many years to complete. |
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| Sunspots appear to be dark because |
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| they are lower in temperature than the surrounding photosphere |
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| the tops of convection cells AND the source of spicules |
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| the largest part of the sun is the ____. |
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| In which ways does the Sun affect the Earth? |
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| 1. SIDS 2. Aurora 3.Geomagnetic Field 4. Power Grids (also, sudden ionospheric disturbances and heating of the atmosphere) |
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| The peak wavelength in the blackbody spectrum of a star with a spectral temperature of 5780k is |
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| A star's actual distance is 100parsecs. Which will be more negative, the star's apparent magnitude or absolute magnitude? |
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| Apparent (I think this answer might be wrong) |
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| Approximately how many times brighter is a star of magnitude +2 compared to one of +6? |
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Definition
| 6-2=4 so 2.512^4, on front sheet it tells you 40. 40 times brighter |
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| On the H-R diagram main sequence, moving from lower right to upper left, what stellar properties increase? (4) |
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| 1. Mass 2. Radius 3.Luminosity 4. Spectral Temp |
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| T or F? On the H-R diagram, as the absolute magnitude scale becomes more negative, the luminosity scale shows an increase in the luminosity of the stars. |
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