How Do We Know That Halo Stars Are Older,on Average,than

question 74

Multiple Choice

How do we know that halo stars are older,on average,than disk stars?

• A)Halo stars orbit in random directions but disk stars have more ordered orbits.
• B)There are no blue halo stars.
• C)There are no red disk stars.
• D)Theories of galaxy formation tell us that the halo formed earlier than the disk.
• E)We see evidence for new stars forming in the disk today.

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Definitions:

Key Words

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External World

The reality existing outside an individual's mind, perceived through the senses.

Validity

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Task-Oriented

Focused or centered on the completion of specific tasks or objectives rather than on broader goals or social interactions.