BIOL 1209 Chapter : 20140408 155308
Document Summary
Creation of solar system: sun formed a gas cloud, a lot of this gas formed a disk, disk gets clumpy, and clumps start clumping together. Explains: the planets orbit in the same plane and rotate together because they formed out of a flat disk. The gassy bodies are in the inner because there is not enough material close in or far out. The icy bodies are outer because they would melt otherwise. Planet temp: t= 280k / sqrt(dau) (to get c, subtract 273 from k) Densities: rock (rocky planets and moon; 3. 3-5. 5 gm/cm3) gas (0. 4-1. 6 gm/cm3) ice (2. 0 gm/cm3) w/holes (asteroids and comets; 0. 4-1. 5 gm/cm3) The sky is blue because blue light scatters more and the setting sun is red because the angle makes the blue light unable to get through. Constellations: origin of wagon (after 3500 bc when the wheel was invented and before 1000 bc as it is already widespread.
