Astronomy 1021 Chapter Notes - Chapter 13: Boxing Styles And Technique, Sequence Point, White Dwarf
16 Dec 2017
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Composition similar to our sun"s, most h and he and a small amount (about 1%) of heavier elements, mostly in small solid gains referred to as interstellar dust. Compared to a forest, in some places the trees are big, or some they"re small, some there"s a combination: stars can only really form from giant molecular clouds (gmc) because. They have enough mass so gravity is strong. They have molecules that can cool the core and reduce thermal pressure: if gravity is not strong enough to overcome the internal pressure of interstellar gas, then the star doesn"t form. This is quite common in our galaxy, which is why star formation doesn"t occur everywhere: two things help gravity win out over pressure. The closer they"re packed, the stronger the gravitational force between them is. Lower the temperature, lower the gas pressure: the balance between gravity and pressure is hydrostatic equilibrium.
