How Do Disk Stars Orbit the Center of the Galaxy

question 20

Multiple Choice

How do disk stars orbit the center of the galaxy?

• A)They all orbit in roughly the same plane and in the same direction.
• B)They have orbits randomly inclined and in different directions relative to the galactic center.
• C)They follow spiral paths along the spiral arms.
• D)They follow orbits that move up and down through the disk,typically taking them about 50,000 light-years above and below the disk on each orbit.

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The difference between two figures that are expected to be equivalent, often arising from timing or measurement errors in data collection.

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