Why Do We Know That at Least One Generation of Stars

question 16

Multiple Choice

Why do we know that at least one generation of stars formed and died before the Milky Way's globular clusters formed?

• A) All globular cluster stars have some amount of heavy elements.
• B) They are so old that nuclear fusion in globular cluster stars has altered their chemical abundances.
• C) Globular clusters are 9 to 10 billion years old.
• D) No globular cluster is older than 12 billion years.
• E) All globular clusters reside in the disk of the Milky Way.

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Definitions:

Initial Investment

The amount of money used to start a project, purchase assets, or establish a business foundation.

Simple Rate Of Return

A method of calculating the return on an investment without taking into account compound interest or the passage of time.

Cash Operating Costs

Direct expenses incurred during regular operations, such as manufacturing costs, labor, and raw materials, excluding non-cash costs like depreciation.

Automating

involves the use of systems and technology to perform tasks with minimal human intervention.