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Suns condense from nebular clouds |
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Mutual attracting force exerted by mass on all other objects |
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the distance that light travels in one year |
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solar system located in the orion arm |
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Center of the galaxy sagittarius A. |
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solar system-11 light hours |
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condensed from a large slowly rotating dust and gas called Nebula |
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two hydrogen atoms combine to form helium |
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Thermonuclear fusion Hydrogen to helium |
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surface 6000 degrees C Sunspots |
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clouds of electrically charged particles |
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caused by magnetic storms activity cycle of 11 years |
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incoming solar radiation at the earth surface and atmosphere |
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region at the top of the atmosphere |
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Sun at 90 degree angle energy spread over smaller area |
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Oblique angle/Less than 90 degrees energy spread over larger area |
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1 rotation per 1 solar day 23 hours 56 min rotates west to east |
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tilted at an angle of 23.5 degrees from the plane of ecliptic |
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1 revolution every 365.2422 solar days 365 days 5 hours 48 minutes 46 seconds |
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365 days needs a leap year to account for .261 leftover |
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half the earth always receiving sunlight divides day from night |
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Straight line joining two points |
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Imaginary Plane connecting earth and sun Half above half below |
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January 3rd (91 million) period when the earth closet to sun |
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July 4th (95 million miles) when the earth furthest from sun |
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Latitude where the sun is directly overhead at noon ranges from 23.5 degrees N to 23.5 degrees S |
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Equal night and day. solar declination is 0 degrees |
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January 3rd (91 million) period when the earth closet to sun |
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July 4th (95 million miles) when the earth furthest from sun |
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Latitude where the sun is directly overhead at noon ranges from 23.5 degrees N to 23.5 degrees S |
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Equal night and day. solar declination is 0 degrees |
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march 21 Spring in northern hemishpere |
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September 21 fall in northern hemisphere |
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solar declination is farthest from equator |
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december 21 winter in northern hemisphere northern hemisphere is tilted away from the sun |
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24 hours daylight at antarctic circle |
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June 21st summer in northern hemisphere |
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24 hours of daylight in artic circle 24 hours of night in antarctic circle |
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