BIOL 1011 Lecture : Lecture5
Document Summary
Why the solar system is set up the way it is formation of the solar system. Planets mercury, venus, earth, mars, jupiter, saturn, uranus, neptune. Stellar nurseries dust is the key to formation. Stars during death throws heavy elements that rise to the surface in all directions when they throw off their top layer. 10 most abundant elements in the sun hydrogen, helium, carbon, nitrogen, oxygen, neon, We are made out of carbon from dead stars. The cloud of gas and dust must become unstable and allow gravity to win. All radioactive isotopes all date back to 4. 6 billion years ago. Comparing to the cosmic abundance, the earth has too much gold. Gold is heavier than iron, therefore, cannot be produced by a star during its normal life, but during a supernova. First, dust must attract one another by electrostatic forces.
