THE SOLAR SYSTEM
THE SOLAR SYSTEM ASTR 1101
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This 4 page Class Notes was uploaded by Stanley Kihn on Tuesday October 13, 2015. The Class Notes belongs to ASTR 1101 at Louisiana State University taught by B. Schaefer in Fall. Since its upload, it has received 21 views. For similar materials see /class/222896/astr-1101-louisiana-state-university in Astronomy at Louisiana State University.
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Date Created: 10/13/15
SUNRISE WITH SEASON w A A v Q H 6 5 V A m x e i V 3 g a s v S Q T 5 415 N EAST 39 sommsi 3039 9 Waxing crescent shurmt wavelengdl l znmgt1rlm wuum 1000pmmmgtgt 10mm 1 cm m cm mu m I m mm mam woom l km 10km Lungesl 100 km wavelengm DD Violet Blue Green allow Visible light cringe Infrared 7 quot quot39 radiation Micrnwavas Radio waves Sun Solar ares spews out charged particles these come to earth spiral down magnetic eld lines make atmosphere Fluoresce causing Aurora 0 Sun in the summer high in the midday summer sky so a shaft of sunlight is concentrated onto a small area which heats the ground effectively and makes the days warmer 0 Sun in the winter low in the midday winter sky so the same shaft of sunlight is spread out over a large area and less heating of the ground takes place 0 Properties of the Sun Distance to the sun 150000000 km 1 AU Mass 21030 kg Radius 70000 km Density 14 gmcc Temperature 5700 K Luminosity 41026 watts Composition 74 H 35 He Tides The high tides occur when the Moon is overhead and this happens on average about an hour later each day as the Moon travels through its orbit Sunseti Low Tide Midnight 7 High Tide Sunrise 7 Low Tide Noon High Tide Spring Tides Lunar and solar tides add together to make big amplitude Neap tides Lunar and solar tides partly cancel to make low amplitude High amplitude when Moon close in its orbit Low amplitude when moon far in its orbit Eclipses If the earth had no atmosphere how would a lunar eclipse look The totally eclipsed parts of the moon would be completely dark No red coloration and much darker during totality If we had no atmosphere then this reddish light would not be present and the Moon s surface would be dark Annular eclipse furthest Total solar eclipse closest Seasons Causes ofthe seasons Earth s tilted axis makes for longer days and higher noonday sun during summer Earth s axis is tilted with respect to its orbit so each hemisphere alternately is pointed closer to the Sun and gets heated more Ifthere were no tilt there d be no seasons It is the tilt of the Earth s axis that dominantly drives the seasons Active Volcanoes Titan Earth Mars Io Insulates Old Volcanoes Earth Venus Atmospheres Earth Mars Venus Giant Gas Planets Titan Triton Rings Saturn No Moons Mercury Venus Ice Caps Europa Pluto Mars and Earth Liquid Water Europa Earth Mars Largely Crater Free surfaces Gas giants Triton Earth Huge Hurricanes Earth Jupiter Neptune No visit by NASA Pluto NASA landed on Surface Earth Moon Mars Venus Asteroids Comets Jupiter Titan Rocky Earth Ceres Mercury Meteor Gassy Saturn Jupiter Icy Satum s rings Titan Eris Pluto Moon Change history Christopher Columbus 7 1504 Crew was shipwrecked on the northern shore of Jamaica He used the lunar eclipse into supplying his sailors with food The Jamaicans knew nothing about theses eclipse Christopher convinced the Jamaicans that a higher visionary was controlling their sun to disappear it changed the cause of history because he was able to get food for his crew for the next year until the Spanish recused him and his sailors Full moon Rising east at Sunset and the lunar month starts 15 days later First quarter Waxing Gibbous Full Waning Gibbous Third quarter Waning Crescent New Moon Waxing Crescent Important Equations Distance Angle S Ra Ra 206265 or D a d 206265 Kepler s law PyemzRau3M0 Inverse Square law b L47td2 or b L47td2 0L ld2 Thermal radiation L area oT 471R2 GT4 Planet temperatures Tplmt 260 KRAU Pyeaf RAU3M0 or RAUyear2l13 Weins Law 7mm 00029m0 ldt Thermal light amp wavelength Mass Energy E nc2 Hydrogen Fusion 4H9 He 2V Energy F GMmdz 67103911 Proved that Copernicus was right 1 1610 Galileo observed that Venus shows a gibbous phase and this is impossible in the geocentric model 2 1838 Bessel observed the parallax of stars with this very small shifting demonstrating that the Earth moves Constellation Orion in Greek legend it represents a great hunter who threatened to kill all the animals in the world One of the stories about how he died was the Zeus made a great scorpion who rose up out of the Earth to sting Orion to death Orin is easily seen high in the south on any winter evening Orion has many bright stares in easily identi ed patterns one of the ones that stands out to most people are his three belt of stars
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