As a White Dwarf Evolves, the Direction of Its Motion

question 26

Multiple Choice

As a white dwarf evolves, the direction of its motion on the Hertzsprung-Russell diagram is from upper left to lower right, which means that

• A) it cools and becomes more luminous.
• B) it cools and becomes less luminous.
• C) it heats up and becomes more luminous.
• D) it heats up and becomes less luminous.

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