Question

What do the absorption lines tell us about a star?
A-the temperature
The age
The brightness
The elements
Answered by GPT 3.5
The absorption lines in a star's spectrum tell us about the elements present in the star. Each element has a unique set of absorption lines, and by analyzing these lines, astronomers can determine which elements are present in the star's atmosphere. This information can provide insights into the star's composition and evolution.
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