ASTR 1102 Chapter : Astronomy 1102 14.1
Document Summary
Energy supplied by fusion maintains the pressure that balances the inward crush of gravity. Energy balance the rate of which energy radiates from the surface of the sun must be the same as the rate of which it is released by fusion in the core. Gravitational contraction provided the energy that heated the core as the sun was forming. Radius 6. 9 x 10^26 m (109 times earth). As far as stars go, the sun is of medium variety. Solar wind a flow of charged particles from the surface of the sun. It is near 1 million k. corona is not uniform. Low energy areas are referred to as coronal holes. Chromosphere middle layer of solar atmosphere, 10^5 10^8 k. this is where the solar colors come from. Convection zone energy transported by rising hot gas. Radiation zone energy transported upward by protons.
