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'''Main sequence''' is the stable phase of a star's lifetime, when outward pressure from internal fusion process using hydrogen for fuel is balanced by the inward force of self-gravitation. This phase is usually the longest phase of a star's lifetime.  

The '''main sequence''' is the stable phase of a star's lifetime, when outward pressure from internal fusion process using hydrogen for fuel is balanced by the inward force of self-gravitation.<ref>{{Cite web|url=https://www.britannica.com/science/star-astronomy/Star-formation-and-evolution|title=Star Formation And Evolution|accessdate=2019-03-31}}</ref> In the evolutionary picture of [[stellar Evolution|stellar evolution]], this phase is usually the longest phase of a star's lifetime, lasting anywhere from 20 million years to 100 billion.<ref>{{cite web|url=https://www.space.com/22437-main-sequence-stars.html|title=Main Sequence Stars: Definition & Life Cycle|accessdate=2019-03-31}}</ref> While [[creation scientists]] agree such stars have a stable light output and are generally stable, they dispute the time periods over which evolutionary scientists claim it lasts as well as it being a part of stellar evolution as unobservable and so not falsifiable.<ref>{{cite web|url=https://answersingenesis.org/kids/science/do-stars-evolve/|title=DO STARS EVOLVE?|accessdate=2019-03-31}}</ref><ref>{{cite web|url=https://answersingenesis.org/astronomy/stars/stellar-evolution-and-millions-of-years/|title=Stellar Evolution and Millions of Years|accessdate=2019-03-31}}</ref>

Our [[Sun]] is a main sequence [[star]].

Our [[Sun]] is a main sequence [[star]].

{{Stars}}

{{Stars}}

[[Category:Astronomy]]

[[Category:Astronomy]]