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Main Sequence

A classification of stars that shine via hydrogen thermonuclear fusion in their cores. Such stars are stable, with no major pulsations or variations. Most stars spend the greatest portion of their lives on the main sequence.


Sun cutaway

Star Color and Energy May 21, 2010

Radio Programs

Moon and Aldebaran Things get complicated for a star September 20, 2016

Moon and Aldebaran Igniting the core of a star July 10, 2015

Vega A middle-aged star with a difference June 5, 2015

Alphecca Stellar siblings with different futures June 27, 2014

Vega Stands High Crowning the early evening sky September 6, 2013

Alkaid Anchoring the Big Dipper July 27, 2013

Megrez Holding together the Big Dipper July 26, 2013

Zeta Puppis A rare stellar hothead April 2, 2013

Adhara Another impressive “dog” star March 1, 2013

Menkar A constellation with a case of the big head November 17, 2012

Summer Triangle The brilliant Summer Triangle July 7, 2012

H-R Diagram Drawing the lives of the stars July 6, 2012

Companions Companionship in the evening sky June 25, 2012

Sirius A close, bright stellar neighbor January 29, 2012

Moon and Companions A big astronomical dwarf October 20, 2011