(m) Each of the numbers you just computed will lead to an estimated diameter (in km)...
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(m) Each of the numbers you just computed will lead to an estimated diameter (in km) of the Sun. To calculate that estimated diameter, you must do the following. 1. First, calculate how many multiples of the track separation would be needed to cross the entire solar diameter. 2. Next, multiply that factor by the physical track separation (in km) that you used to complete the table just above. Example: Suppose you had measured a separation of 1.2 mm between the transits seen from Damascus and Pretoria (your value may differ by several tenths of a mm; don't worry if it does). If the solar diameter came out to be 120 mm, the Sun would be (120/1.2), or 100, times as large as the space between the tracks, or the following. Dsun 100x2.6 x 6,640 km 1.73 million km Northern Hemisphere Site Southern Hemisphere Site Number of Track Separations Needed to Span Diameter Inferred Sun Diameter (km) Agana, Guam Island Adelaide, Australia Alofi, Niue Anchorage, Alaska Moscow, Russia Georgetown, Guyana Damascus, Syria (n) Calculate the mean of the five values you obtained for the Sun's diameter in km. km Antanarivo, Madagascar Sao Paulo, Brazil Pretoria, South Africa (0) Finally, use this form of the small-angle formula to estimate the Sun's distance (in km) from its apparent diameter (32 arcminutes, or 0.53 degree). Earth Sun 57.3 0.53 Rearth Daun. REarth1 AU- 0.53⁰ -108-Dun km REarth = 1 AU Dsun (m) Each of the numbers you just computed will lead to an estimated diameter (in km) of the Sun. To calculate that estimated diameter, you must do the following. 1. First, calculate how many multiples of the track separation would be needed to cross the entire solar diameter. 2. Next, multiply that factor by the physical track separation (in km) that you used to complete the table just above. Example: Suppose you had measured a separation of 1.2 mm between the transits seen from Damascus and Pretoria (your value may differ by several tenths of a mm; don't worry if it does). If the solar diameter came out to be 120 mm, the Sun would be (120/1.2), or 100, times as large as the space between the tracks, or the following. Dsun 100x2.6 x 6,640 km 1.73 million km Northern Hemisphere Site Southern Hemisphere Site Number of Track Separations Needed to Span Diameter Inferred Sun Diameter (km) Agana, Guam Island Adelaide, Australia Alofi, Niue Anchorage, Alaska Moscow, Russia Georgetown, Guyana Damascus, Syria (n) Calculate the mean of the five values you obtained for the Sun's diameter in km. km Antanarivo, Madagascar Sao Paulo, Brazil Pretoria, South Africa (0) Finally, use this form of the small-angle formula to estimate the Sun's distance (in km) from its apparent diameter (32 arcminutes, or 0.53 degree). Earth Sun 57.3 0.53 Rearth Daun. REarth1 AU- 0.53⁰ -108-Dun km REarth = 1 AU Dsun
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Sol 1 Each track separation in mm on the Suns image corresponding to a certai... View the full answer
Related Book For
Visualizing Environmental Science
ISBN: 978-1119147527
4th edition
Authors: Linda R. Berg, David M. Hassenzahl, Mary Catherine Hager
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