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Spectral lines can act like a _________ to help astronomers identify the chemical _________ of the electromagnetic radiation characteristics of a star.
Overview
A broad and comprehensive summary of a topic, situation, or area of interest.
Important Points
The key or central ideas and arguments that are crucial to understanding a topic or issue.
Table Of Contents
An organized list of the chapters, sections, or topics in a document or book, typically found at its beginning.
Location
Refers to a specific place or position where something exists or where an event occurs.
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