AST-1A Lecture Notes - Lecture 17: Coronal Mass Ejection, Photosphere, Chromosphere
Document Summary
Goal: to understand how the sun works. Objective: the journey to the center of the sun. Scheduled departure time: 5 minutes, fasten your seatbelt. 1. 25 million miles (0. 8 million from the surface) Corona- outside temp: 1 million k, 100k miles from the surface. Chromosphere- outside temp: 10000 k, 1k miles from the surface. The sun rotates every 26-28 days depending on where on the sun you are. Photosphere: outside temp: 5800k, surface, density: 1% of air, all of the sun"s light that we see comes from here. Photosphere: outside temp, 5800k, surface (400 km deep)!, They are 1-2k cooler, so compared to the rest of the sun, they appear to be darker. Kind of like in a pot of boiling water. Warning: breathing apparatus will be required as the sun is made of 74% Hydrogen, 25% helium and only 1% other stuff. Density of the sun- about the density of water.
