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•Question 6:
(1 point)
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One of the nearest and brightest stars in the (southern) sky is Alpha Centauri. Assume that its radius is the same as that of
the sun. The distance to
Alpha Centauri can be found in Appendix A of the text. Assuming a perfect telescope and no atmospheric
turbulence, what is the angular
diameter (not radius!) of the star as seen from Earth?
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• 1. 7 x 10-4 arcseconds.
• 2. 7 x 10-2 arcseconds.
• 3. 3.5 x 10-2 arcseconds.
• 4. 3.5 x 10-3 arcseconds.
•*5. 7 x 10-3 arcseconds.
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