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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

Megrez Holding together the Big Dipper May 7, 2022

Alphecca Stellar siblings with different futures May 21, 2021

Altair A star that’s in the prime of life August 26, 2020

Altair Painting a portrait of a star October 12, 2019

Solar Twin A star that looks familiar August 26, 2019

More G Stars A rare class of stars October 21, 2018

G Stars A rare class of stars October 20, 2018

Telling Tails The tail ends of two constellations October 13, 2018

Moon and Regulus A star in the prime of life December 7, 2017

Featured Images

ek draconis

Breathing Fire March 16, 2022