Question 3: The Sun moves with a velocity of about 220km/sec in its orbit about the galactic center. What is the approximate time required for the Sun (and the entire Solar System) to complete one orbit of the galactic center?
±a. 115 million years ±b. 230 million years ±c. 10 billion years ±d. 460 million years
Starry Night College Version 7
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Question 4: Carefully examine the shape of the spiral arms. In which direction do you think the galaxy is rotating?
Question 5: The Solar System is embedded within the galaxy. Why does the Milky Way appear as a narrow band of light instead of appearing as faint but evenly distributed light across the entire sky?
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- Spring '14
- AndrewB.Wallace
