GEOG 2050 Chapter : Atomosphere
Document Summary
Key concepts: milky way galaxy, solar system, speed of light, gravity, solar system formation. Inner planets: sun insolation, solar radiation, evolution of the atmosphere, solar radiation, fusion, solar wind. Origin of the universe: universe formed 13. 5 to 15 billion years ago, big bang theory, milky way galaxy, oldest star 13. 6 billion years old, disc formed between 6. 5 and 10. 1 billion years ago. Speed of light: 300000 km/sec, light year 10 trillion km. Gravity: attractive force between objects with mass. Responsible for: formation of the solar system, orbits of planets, moons orbit, tides. Sun: large mass, 99. 99% of solar system, diameter 1392000 km, 109 earths, 74% hydrogen, 25% helium, 2% other, nuclear fusion of hydrogen atoms produce helium and releasing energy, surface, 5770 k, 9941 f, core= 28 million f. Mercury: no atmosphere, 183 c to 427 c. Venus: high co2, strong greenhouse, 400 c. Solar radiance: reaches the earth"s atmosphere and surface solar constant.
