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Star Selection Your Guide to Choosing the Star That’s Right for You Types of Stars Main Sequence 90% of stars (Sun) Hydrogen to Helium Giant & Supergiants Sun in 5 billion years Helium fusion Stars you see in sky SG end in supernova White Dwarfs Dying star Hertzsprung-Russell Diagram http://www.projectcalico.com/images/HERTZSPRUNG-RUSSELL%20DIAGRAM-%2001%2001%2007.jpg Life Cycle of a Star Classes of Stars Classified by Spectral Type Emit different light/heat O: Blue / 60,000º K B: Blue-white / 30,000º K A: White / 10,000º K F: Yellow-white / 7,500º K G: Yellow (Sun) / 6,000º K K: Yellow-orange / 5,000º K M : Red / < 3,500º K Stellar Spectral Types. Retrieved April 6, 2008, Web site: http://hyperphysics.phy-astr.gsu.edu/hbase/starlog/staspe.html Exoplanets 2012 Exoplanets 2014
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