During the main sequence stage of the life cycle of a star, it cycles, appearing brighter and dimmer in turns.
The life cycle of a star is a cycle which describes the time from the birth or formation of the star, through its growth and expansion, and then finally the death of the star.
The life cycle of a star occurs in seven stages and occurs over billions of years.
One of the stages is the main sequence stage.
During the main sequence stage of a star's life, it cycles, appearing brighter and dimmer in turns.
Therefore, the life cycle of a star is a cycle from the birth to death of the star.
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