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Earth Sun Relationship
Solar System/Rotation & Revolution/Seasons/Structure of Atmosphere
48
Geography
Undergraduate 4
09/10/2012

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Cards

Term
Planetesimal hypothesis
Definition
Suns condense from nebular clouds
Term
Gravity
Definition
Mutual attracting force exerted by mass on all other objects
Term
Speed of light
Definition
186,000 mps
Term
Light year
Definition
the distance that light travels in one year
Term
1 light year
Definition
6 trillion miles
Term
Milky way
Definition
galaxy
Term
milky way
Definition
solar system located in the orion arm
Term
milky way
Definition
Center of the galaxy sagittarius A.
Term
milky way
Definition
100,000 light years
Term
milky way
Definition
solar system-11 light hours
Term
milky way
Definition
condensed from a large slowly rotating dust and gas called Nebula
Term
Sun
Definition
Diameter=863,746 miles
Term
Sun
Definition
Mass=1.989*1030kg
Term
sun
Definition
75% Hydrogen
25% Helium
Term
Fusion
Definition
two hydrogen atoms combine to form helium
Term
Sun Core
Definition
Thermonuclear fusion
Hydrogen to helium
Term
Sun Photoshpere
Definition
surface
6000 degrees C
Sunspots
Term
Solar wind
Definition
clouds of electrically charged particles
Term
sunspots
Definition
caused by magnetic storms
activity cycle of 11 years
Term
insolation
Definition
incoming solar radiation at the earth surface and atmosphere
Term
thermosphere
Definition
region at the top of the atmosphere
Term
Direct radiation
Definition
Sun at 90 degree angle
energy spread over smaller area
Term
Diffused Radiation
Definition
Oblique angle/Less than 90 degrees
energy spread over larger area
Term
Earth Rotation
Definition
1 rotation per 1 solar day
23 hours 56 min
rotates west to east
Term
Earth Axis of Rotation
Definition
tilted at an angle of 23.5 degrees from the plane of ecliptic
Term
Earth Revolution
Definition
1 revolution every 365.2422 solar days
365 days 5 hours 48 minutes 46 seconds
Term
Gregorian Calendar
Definition
365 days
needs a leap year to account for .261 leftover
Term
Leap Year
Definition
every 4th year
Term
Earth Orbit
Definition
Counterclockwise to sun
Term
Circle of illumination
Definition
half the earth always receiving sunlight
divides day from night
Term
ecliptical plane
Definition
Straight line joining two points
Term
Plane of Ecliptic
Definition
Imaginary Plane connecting earth and sun
Half above half below
Term
Perihelion
Definition
January 3rd (91 million) period when the earth closet to sun
Term
Aphelion
Definition
July 4th (95 million miles) when the earth furthest from sun
Term
Solar Declination
Definition
Latitude where the sun is directly overhead at noon
ranges from 23.5 degrees N to 23.5 degrees S
Term
Equinox
Definition
Equal night and day.
solar declination is 0 degrees
Term
Vernal/Autumnal Equino
Definition
Term
Perihelion
Definition
January 3rd (91 million) period when the earth closet to sun
Term
Aphelion
Definition
July 4th (95 million miles) when the earth furthest from sun
Term
Solar Declination
Definition
Latitude where the sun is directly overhead at noon
ranges from 23.5 degrees N to 23.5 degrees S
Term
Equinox
Definition
Equal night and day.
solar declination is 0 degrees
Term
Vernal Equinox
Definition
march 21 Spring in northern hemishpere
Term
Autumnal Equinox
Definition
September 21 fall in northern hemisphere
Term
solstice
Definition
solar declination is farthest from equator
Term
Winter solstice
Definition
december 21 winter in northern hemisphere
northern hemisphere is tilted away from the sun
Term
Winter Solstice
Definition
24 hours daylight at antarctic circle
Term
Summer Solstice
Definition
June 21st summer in northern hemisphere
Term
summer solstice
Definition
24 hours of daylight in artic circle
24 hours of night in antarctic circle
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