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Chapter 2

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Department
Geography
Course
GEOG 2050
Professor
All Professors
Semester
Fall

Description
Chapter 2 Solar Energy to Earth and the SeasonsIntro The energy from our sun sets into motion the weather systems and the ocean currents that greatly influence our livesIt is this solar energy along with the suns tilt orientation revolution and rotation that produce our daily seasonal and annual patterns of changing day length and sun anglesThe Prevailing TheoryThe Planetismal Hypothesis dustcloudoOur Solar System condensed from a large slowly rotating and collapsing cloud of dust and gas called a nebulaGravity the mutual attraction exerted by the mass of an object upon all other objectswas the key forceThe Planetismal Hypothesis says suns condensed from nebular clouds with planets forming in orbits around the central massDistanceSpeed of light300000 kmps kilometers per second or 186000 mps which is very fastOr light travels 95 trillion kilometers per year otherwise known as a lightyearThe moon is 128 seconds away from the earth in terms of light speedoIt took Apollo 3 days to get to the moonThe Milky Way is 100000 lightyears from side to sideThe known universe observable from Earth stretches 12 billion lightyears in all directions SO bigThe SunOur closest starApproximately 93 million miles away from us same distance as travelling around the earths equator 3750 timesrdthWere closest to the sun on January 3 at the perihelion and farthest away on July 4 at the aphelionSolar EnergyFusion
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