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The term "main sequence" refers to a type of star that is in a specific period of energy creation. Nuclear fusion has begun in the star's core, converting hydrogen into helium.

en.wikipedia.org/wiki/Main_sequence

In astronomy, the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude ...

www.space.com/22437-main-sequence-stars.html

May 5, 2015 ... Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. Most of the stars in the universe are main ...

www.atnf.csiro.au/outreach/education/senior/astrophysics/stellarevolution_mainsequence.html

The majority of stars in the galaxy, including our Sun, Sirius and Alpha Centauri A and B are all main sequence stars. The Sun's relative longevity and stability ...

www.universetoday.com/24643/star-main-sequence

Feb 4, 2009 ... Most of the stars in the Universe are in the main sequence stage of their lives, a point in their stellar evolution where they're converting ...

study.com/academy/lesson/main-sequence-star-definition-facts-quiz.html

A main sequence star is a star that is in the longest stage of its life. In this lesson, you will learn the characteristics of this phase, how it...

www.astro.keele.ac.uk/workx/starlife/StarpageS_26M.html

It will show all the stages that a small star, and a massive star have to go through ... Stage 5 - A star of one solar mass remains in main sequence for about 10 ...

www.ask.com/youtube?q=Main+Sequence+Stars&v=s1E1ZiiFSec
Oct 30, 2013 ... Discusses Main Sequence stars, the OBAFGKM classification scheme, and the Hertzsprung-Russel (H-R) Diagram. Please refer to sections ...

aspire.cosmic-ray.org/Labs/StarLife/mainsequence.html

The Main Sequence is where stars spend most of their lives. Main sequence stars like our sun have a hot, dense core where hydrogen is fused into helium.

socratic.org/questions/how-is-nuclear-fusion-in-a-main-sequence-star-different-from-nuclear-fusion-in-a

May 24, 2017 ... Main Sequence stars are in the stage in the life cycle of a star by which there is still enough Hydrogen to be fused together, which then in turn ...