PHYS 1600 Lecture Notes - Lecture 7: Solar Cycle, George Ellery Hale, Pieter Zeeman
17 Apr 2017
School
Department
Course
Professor
Document Summary
The mass of the sun is 2x1030kg. This can be found using kepler"s 3rd law, as the planets rotating around the sun are satellites. Occurs because we can see different temperatures at different depths of the photosphere. Once the gases arrive at the surface, they radiate energy into space (seen as visible light and other electromagnetic radiation) Upon radiating, the gases cool, spill over the edges of the granules and dive back down into the sun along the boundaries of the granule: centers of granules are 100k hotter than the edges, as determined by. Stefan-boltzmann"s law (hotter regions emit more photons per square meter than cooler regions do. 2000 km thick around the edge of the dark moon: characterized by spikes of gas called spicules. Typical spicule rises for several minutes at the rate of 72,000 km/h to a height of nearly 10,000 km before it collapses and fades away.
