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Chapter 7 - Flashcards

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Class:ASTR 1400 - Solar System Astronomy
Subject:ASTRONOMY
University:Texas Tech University
Term:Spring 2010
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Sun Radius : 696,000 km = 108R earth Mass : 333,000 M earth Composition : 98% Helium and Hydrogen, 2% other elements. the most influential object in our solar system.
Mercury Radius-2,440 km = 0.38R earth Mass-0.055M earth Composition- Rocks, Metals Temp - 700K day, 100K Nights Moons - 0 innermost planet of our solar system, and the smallest of the first 8 planets. Mariner 10 is the only thing to land there getting pics of one hemisphere no life, no wind, no rain, no active volcanoes
Venus Radius- 6,051 km = 0.95R earth Mass- 0.82M earth Composition- rocks, metals Temp - 740K Moons- 0 2nd planet from the sun, almost same size as earth surface has mountains, valleys, and craters, possible volcanic activity
Earth Composition- rocks, metals Radius- 6,378 km = 1R earth Mass- 1.00M earth Moons- 1
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Mars Composition- rocks, metals Radius- 3,397 km = 0.53R earth Mass- 0.11M earth Moons- 2 [very small] Phobos, and Deimos most studied planet other than earth
Jupiter Composition- mostly hydrogen and helium Radius- 71,492 km = 11.2R earth Mass- 318M earth Moons- at least 63 p.219
Saturn Composition- mostly hydrogen and helium Radius- 60,268 km = 9.4R earth Mass- 95.2M earth Moons- at least 60 2nd largest planet
Uranus Composition- hydrogen, helium, hydrogen compounds. (water, ammonia, and methane) Moons- at least 27 Radius- 25,559 km = 4.0R earth Mass - 14.5M earth
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Neptune Radius- 24,764 km = 3.9R earth Mass- 17.1M earth Composition- hydrogen, helium, hydrogen compounds Moons- at least 13, largest moon Triton
Pluto Radius- 1,160 km = 0.18R earth Mass- 0.0022M earth Composition- ice, rock Moons- 3 dwarf planet
Terrestrial Planets the four planets of the inner solar system Mercury, Venus, Earth, and Mars terrestrial means "earth-like" they have few moons, if any. and none have rings
Jovian Planets the four large planets of the outer solar system Jupiter, Saturn, Uranus, and Neptune Jovian means Jupiter-like made mostly of hydrogen, helium and hydrogen compounds
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Asteroids small, rocky bodies that orbit the Sun much like other planets, but they are much smaller than planets. -most are found within the asteroid belt between the orbits of Mars and Jupiter.
Comets small objects that orbit the sun, but they are made largely of ices.
Runaway Greenhouse Effect a positive feedback cycle in which heating cause by the greenhouse effect causes more greenhouse gases to enter the atmosphere, which further enhances the greenhouse effect.
What planets atmosphere is mainly carbon dioxide venus, mars
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Thickest to Thinnest atmosphere venus earth mars moon/mercury
What is a Bar? unit of pressure
Greenhouse Gas a gas that absorbs infrared light
Albedo describes the fraction of sunlight reflected by a surface.
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Cassini Division
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 Sun Radius : 696,000 km = 108R earth
Mass : 333,000 M earth
Composition : 98% Helium and Hydrogen, 2% other elements.

the most influential object in our solar system.
 Mercury Radius-2,440 km = 0.38R earth
Mass-0.055M earth
Composition- Rocks, Metals
Temp - 700K day, 100K Nights
Moons - 0
innermost planet of our solar system, and the smallest of the first 8 planets.
Mariner 10 is the only thing to land there getting pics of one hemisphere
no life, no wind, no rain, no active volcanoes
 Venus Radius- 6,051 km = 0.95R earth
Mass- 0.82M earth
Composition- rocks, metals
Temp - 740K
Moons- 0
2nd planet from the sun, almost same size as earth
surface has mountains, valleys, and craters, possible volcanic activity
 EarthComposition- rocks, metals
Radius- 6,378 km = 1R earth
Mass- 1.00M earth
Moons- 1
 MarsComposition- rocks, metals
Radius- 3,397 km = 0.53R earth
Mass- 0.11M earth
Moons- 2 [very small] Phobos, and Deimos
most studied planet other than earth

 Jupiter Composition- mostly hydrogen and helium
Radius- 71,492 km = 11.2R earth
Mass- 318M earth
Moons- at least 63




p.219
 Saturn Composition- mostly hydrogen and helium
Radius- 60,268 km = 9.4R earth
Mass- 95.2M earth
Moons- at least 60
2nd largest planet
 UranusComposition- hydrogen, helium, hydrogen compounds. (water, ammonia, and methane)
Moons- at least 27
Radius- 25,559 km = 4.0R earth
Mass - 14.5M earth
 NeptuneRadius- 24,764 km = 3.9R earth
Mass- 17.1M earth
Composition- hydrogen, helium, hydrogen compounds
Moons- at least 13, largest moon Triton
 PlutoRadius- 1,160 km = 0.18R earth
Mass- 0.0022M earth
Composition- ice, rock
Moons- 3
dwarf planet
 Terrestrial Planets the four planets of the inner solar system
Mercury, Venus, Earth, and Mars

terrestrial means "earth-like"

they have few moons, if any. and none have rings
 Jovian Planets the four large planets of the outer solar system
Jupiter, Saturn, Uranus, and Neptune

Jovian means Jupiter-like

made mostly of hydrogen, helium and hydrogen compounds
 Asteroids small, rocky bodies that orbit the Sun much like other planets, but they are much smaller than planets.

-most are found within the asteroid belt between the orbits of Mars and Jupiter.
 Comets small objects that orbit the sun, but they are made largely of ices.
 Runaway Greenhouse Effecta positive feedback cycle in which heating cause by the greenhouse effect causes more greenhouse gases to enter the atmosphere, which further enhances the greenhouse effect.
 What planets atmosphere is mainly carbon dioxidevenus, mars
 Thickest to Thinnest atmospherevenus
earth
mars
moon/mercury
 What is a Bar? unit of pressure
 Greenhouse Gasa gas that absorbs infrared light
 Albedodescribes the fraction of sunlight reflected by a surface.
 Cassini Division 
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