Earth Sciences 1086F/G Lecture Notes - Lecture 4: Milky Way, Solar Wind, Photosphere
24 Mar 2016
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Chapter 4: the sun: brighter than about 85% of the other stars in our milky way galaxy, there is not really a surface" to the sun; made of gas that becomes denser as you move toward the centre. 4000 k, or about 1000 degrees cooler than their surroundings: during intense ares, corresponding intense magnetic storms occur on earth. Earth: interference to complete breakdown of power grids and systems carrying telemetric signals and northern lights". Sun at average speeds of 400 km/s, although the rate can vary from 300 km/s to 800 km/s). That requires a star to reach an internal temperature of 600 million kelvin, which is not likely to happen to the sun.
