GEO 121 1st Edition Lecture 11 Outline of Last Lecture I Exam Day Outline of Current Lecture II Galaxy III Solar System IV Gravity V Planet a Terrestrial b Gas VI Fusion a Thermonuclear VII Solar Winds VIII Atmosphere IX Barometer Current Lecture Galaxy Like an enormous island in the universe An almost incomprehensible cluster of stars dust and gases surrounded by space Solar System All of the heavenly bodies surrounding a particular star due to the stars dominant mass and gravity Gravity The attractive force that one body has for another Planet A celestial body in orbit around the sun with sufficient gravitational attraction to overcome rigid body forces and assume a nearly spherical shape and has cleared the neighborhood around its orbit Terrestrial Planet o Composed of rock and metallic materials o Mercury Venus Earth and Mars Gas Planets o Also known as giant planets These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o Composed of lighter ices liquids and gases o No solid surface on which to walk o Jupiter Saturn Uranus Neptune Fusion Reactions Thermonuclear o The fusing together of 2 hydrogen atoms to create one helium atom o This process releases tremendous amounts of energy Solar Winds Streams of hot ions travelling outward from the sun Atmosphere Blanket of air composed of various gases that envelopes Earth Barometer Measures Pressure o 29 92 inches of mercury 1013 millibars 14 7 psi
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