GEOG 2050 Chapter : Geagraphy Intro
Document Summary
Extra credit- post weekly activity and you have a week; quizzes due friday at midnight and there is 5 questions. Universe formed -13. 5 to 15 billion years ago. Big bang theory- how the universe is formed. Milky way galaxy: oldest star-13. 6 billion years, disk formed between 6. 5 and 10. 1 billion years ago. Speed of light= 300,000 km/sec (186000 miles/sec) Light year= 10 trillion km (6 trillion miles: gravity. And more: solar system formation system heavy rocker planets are closer to the sun) Rotating solar system begins to form from dust and gas 4. 6 billion years ago. Gravitational forces- they are acting on the mass with the proto solar. Heavier materials clump near center to form innermost proto-planets ( Lighter materials coalesce near periphery to form outer planets. Earth forms out of iron, nickel, manganese, and silicates. Diameter 1392000 km (865000 mi) 109 earths: the sun. Nuclear fusion of hydrogen atoms produce helium and releasing energy.
