Bell Ringer 9/24 Write down three things you know about the sun.

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Presentation transcript:

Bell Ringer 9/24 Write down three things you know about the sun.

Chapter 29 – Stellar Evolution 29.1 Notes

The Sun Largest object in solar system Diameter = 109 Earths across Mass = 330,000x as massive as Earth 99% of mass in Solar System

Fusion Combination of 2 or more light-weight atomic nuclei into 1 heavier nuclei http://www.thethinkingblog.com/2007_08_01_archive.html

Fission Splitting of 1 heavier nuclei into 2 or more light-weight nuclei http://whyfiles.org/130nukes/images/fission.jpg

Sun Produces energy by fusing hydrogen atoms into helium atoms Mass is lost and becomes energy given off by sun

Sun Move energy in variety of wavelengths in all directions Tiny fraction comes to Earth http://www.world-builders.org/lessons/less/biomes/bgifs/sunen.gif

In-Class Assignment Constellation Crossword Puzzle

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