Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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The description of the word you requested from the astronomical dictionary is given below.

the main sequence

The Main Sequence is a narrow strip in the Hertzsprung-Russell Diagram where most stars spend most of their lives. A star on the Main Sequence is called a main-sequence star. A main-sequence star gets its energy from converting hydrogen to helium in nuclear fusion reactions.