the ni ne planets chp 21.notebook · the ni ne planets chp 21.notebook 3 may 18, 2017 apr 81:43 pm...
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The Ni ne Planets Chp 21.notebook
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The Nine Planets
This section describe the scale of the solar system, the discovery of the planets, and planetary motion. The section also introduces the differences between the inner and outer planets.
Planetmeans "wanderers"Ancient astronomers discovered stars that wandered across the sky
Solar SystemSun8 planets My Very Exceptional Mother Just Served Us Nachos (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune)MoonsAsteroids
Measuring DistancesAstronomical Unit
Average distance between the Earth and the Sun1 AU = 150 million kilometers
Speed of LightLight travels about 300,000 km/s18,000,000 km in 1 minuteTakes the Sun's light to reach Earth in 8.3 minutes
QuestionsIf light travels 18 million km in 1 min, how far away is Earth fromthe Sun if sunlight takes 8.3 minutes to reach Earth?
18,000,000 km/min X 8.3 min = 149,400,000 km
How far is Mercury from the sun if sunlight takes 3.2 min to reachits surface?
18,000,000 km/min X 3.2 min = 57,600,000 km
Solar System divided into 2 main parts:
Inner PlanetsTerrestrial Planets
dense and rockyMercury, Venus, Earth, Mars
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The Outer PlanetsGas Giants
Jupiter, Saturn, Uranus, Neptune
What you should know????
1. Which planets are part of the inner solar system?2. Why are the inner planets known as the terrestrial planets?3. Which planets are part of the outer solar system?4. What is the speed of light?5. How do the orbits differ from the inner to the outer planets?
Our Solar System
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MercuryClosest to Sun1 day = 59 Earth days1 year = 88 Earth daysNo atmosphere
VenusEarth's TwinRetrograde rotation opposite directionclockwise spinAtmospheregreenhouse effectmostly CO2sulfur gives it it's yellowish orange colorHottest planet1 day = 243 days1 year = 224 days
EarthOnly planet with water in three states
solid, liquid, gasonly planet with life1 day = 23 h, 56 min1 year = 365 daysOne moon Moon
Mars1 day = 24 h, 40 min1 year = 687 daysConsidered a cold planetColored red rust (iron)2 Moons Phobes and DeimosLargest Volcano in S.S. Olympus MonsWater Polar Ice Caps
JupiterLargest PlanetMade of hydrogen and heliumThe Great Red Spot giant storm, 1.5 times
the size of Earth1 day = 9 h, 54 min1 year = 11 years, 313 daysDark bands belts gases sinkingLight bands zones gases rising
Saturn1 day = 10 h, 42 min1 year = 29 years 155 daysLargest ring system made of ice/rocks
Uranus 1 day = 17 h, 12 min1 year = 83 years, 273 daysBluegreen in colorTipped on side
may have been hit by a huge object
Neptune1 day = 16 h, 6 min1 year = 163 years, 263 daysGreat Dark Spot storm Belts of clouds formed from the rising and
sinking of air to create white clouds
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Section 4
Moons
Satellitesa natural or artificial body that revolves around a planet
Earth's Mooncalled Luna4.6 billion years oldformations
1. Captured by Earth's gravity2. Formed at the same time as Earth and from the same
materials as the Earth3. Earth was spinning so fast that piece flew off to become the
moon
Phases of the Moon
Why does the moon appear to go through phases?
http://www.sciencenetlinks.com/interactives/moon/moon_challenge/moon_challenge.html
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Eclipses
Eclipseswhen the shadow of one celestial body falls on another
Solar Eclipsemoon comes between the Earth and the Sun
Lunar EclipseEarth comes between the Moon and the Sun
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Small Bodies in the Solar System
Cometssmall body of ice, rock, and cosmic dust loosely packed together
Asteroidsrocky bodies that go around the sunvarious sizesirregular shape
asteroid beltwide region between the orbits of Mars and Jupiter
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I. Solar SystemA. Inner Planets
1. Mercury2. Venus3. Earth4. Mars
B. Outer Planets1. Jupiter2. Saturn3. Neptune4. Uranus
II.A.
1.2.
B.III.
A.B.
1.2.