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![Page 1: Uslides1](https://reader035.fdocuments.us/reader035/viewer/2022062312/55509f09b4c9058b208b4b5c/html5/thumbnails/1.jpg)
Physical Science
The Universe Around Us
How does it Work?
What is it made of?
How does it affect us?
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Astronomy
The Oldest Science
navigationcalendar systems
agriculture
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Babylon & Egypt
Planetary motion
North Celestial Pole
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Aristotle
Geocentrism
Perfect circles
Finite
Natural motion
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Ptolemy
Retrograde motion
epicycles
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Retrograde motion
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Copernicus
Heliocentrism
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Galileo
His evidence for Copernicanism:
Lunar valley shadowsSunspotsVenus’ phasesJupiter’s moons
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Lunar Shadows
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Sunspots
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Venus’ Phases
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Jupiter’s Moons
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Planetary orbits = Ellipses
Johannes Kepler
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Skywatching
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The Reason for Seasons
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Lunar phases
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Lunar Orbit vs. Earth’s Orbit
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Solar Eclipse
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Solar Eclipse
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Lunar Eclipse
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Lunar Eclipse
![Page 22: Uslides1](https://reader035.fdocuments.us/reader035/viewer/2022062312/55509f09b4c9058b208b4b5c/html5/thumbnails/22.jpg)
Common Orbital Planes
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Zodiac constellations
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Planetary paths
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The 7 day weekEnglish Sunday Monday Tuesda
yWednesday
Thursday Friday Saturday
French dimanche
Lundi Mardi Mercredi Jeudi Vendredi
samedi
Spanish
Domingo
Lunes Martes Miercoles Jueves Viernes
sabado
Italian Domenica
Luedi Martedi Mercoledi Giovedi Venerdi
sabato
German
Sonntag Montag Dienstag
Mittwoch Donnerstag
Freitag Samstag
Dutch Zondag Maandag
Dinsdag
Woensdag
Donderdag
Vrijdag
Zaterdag
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Ecliptic = Sun’s path
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Sun’s Path
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Celestial Sphere
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Circumpolar Constellations
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Constellations
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Modern Constellations
Ursa Majorvs.
“Big Dipper”
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Legend of the Bear
Hibernation?
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The Solar System
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Beginning of the Solar System
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Origins of the solar system
Solar nebula
Frequentcollisions
Many fragments
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The Sun
Chief energy source(photosynthesis)
Nearest star
Mainly hydrogen & helium
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Photosphere
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Corona
1,000,000 K+
Highly ionizedGases
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The Solar Wind
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Aurora Borealis(northern lights)
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Mercury
Smallest (4880 km)
88 day year
Synchronous orbit
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Synchronous Rotation
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Mercurian Magnetic Field
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Messenger
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Venus
“sister” of Earth
243 days = year
Atmosphere(100x Earth)
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Venusian Atmosphere
Greenhouse effect
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“Backward” Rotation
Previous Collision??
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Mars
Red planet (rust)
686 days = year
Weak atmosphere(mainly CO2)
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Martian Ice?
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Martian Moons
Phobos & Deimos
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Jupiter
12 years = year
10 hours = day
Volume = 1400Earths
Made of H, He
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Great Red Spot
400+ year storm
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Jupiter’s Interior
No solid surface
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Galilean Moons
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Saturn
29 year cycle
10 hour day
rings
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Titan
Largest moon
Methane atmosphere and lakes
Solid water on surface
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Uranus
First modern planet
discovered 1781
84 year cycle
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Another collision victim
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Neptune
Discovered mathematically (1846)
164 year cycle
Great Dark Spot
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Pluto
Jan 23, 1930
Jan 29, 1930 Tombaugh
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Pluto’s orbit
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Plutonian Moons
Charon
Nix
Hydra
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Kuiper Belt
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Kuiper Belt objects
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Oort Cloud
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Comets
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Meteors
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Asteroid Belt
Ceres (1801)
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Bode’s Law (1768)
Anleitung zur Kenntniss des gestirnten Himmels
“Let the distance from the Sun to Saturn be taken as 100, then Mercury is separated by 4 such parts from the Sun. Venus is 4+3=7. The Earth 4+6=10. Mars 4+12=16. Now comes a gap in this so orderly progression. After Mars there follows a space of 4+24=28 parts, in which no planet has yet been seen. Can one believe that the Founder of the universe had left this space empty? Certainly not. From here we come to the distance of Jupiter by 4+48=52 parts, and finally to that of Saturn by 4+96=100 parts.”
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Planetary orbits = Ellipses
Johannes Kepler
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Bode’s LawPlanet K Bode’s ActualMercury 0 0.4 AU 0.39 AUVenus 1 0.7 0.72Earth 2 1.0 1.00Mars 4 1.6 1.52
8 2.8 2.77Jupiter 16 5.2 5.2Saturn 32 10 9.54
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Asteroids
Irregular shape
Cratered
small
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Milky Way Galaxy
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Celestial Distances
Earth - Moon 3.84 x 105 km
Earth-Sun 1.5 x 108 km
Sun-Pluto 5.9 x 109 km
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Nearest Star
Proxima Centauri:
3.97 x 1013 Km
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Light Year
C = 3 x 108 m/s
(3 x 108m/s) x (60 s/min) x
(60 min/hr) x (24hr/d) x (365.25 d/yr)
= 9.46 x 1015 m/yr
= 9.46 x 1012km/yr
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Galaxies
Elliptical, spiral, irregular
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Milky Way Galaxy
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Stellar Characteristics
Brightness(magnitude)
Color(temperature)
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Magnitude
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Luminosity
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Color
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Star Sizes
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Hertzsprung Russell diagram
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Star Evolution
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Star “Nursery”
Dust+
Gas+
Energy
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Protostar Development
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Fusion
4 1H -> 4He
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Equilibrium
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Brown Dwarf
Failed Star?
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Red Giant
Triple Alphaprocess
3 He -> C
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Planetary Nebula
Residual“Smoke ring”
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White Dwarf
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Sun Sized Star
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Star Evolution
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Supergiant Star
Betelgeuse
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Supernova
SN1987A
105415721604
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Crab Nebula
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Pulsar
LGM project
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Neutron Star
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Black Holes
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Evidence for Black holes
X-ray source
Spacetime distortion
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Local Cluster of Galaxies
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Red Shift
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Hubble’s Law
V = H d
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Steady State Model
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Big Bang Theory
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Evidence
Red shift
Hubble time (age)
Cosmic Backgroundradiation
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Leftover Energy
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The Future?
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The Speed of Light
C = 3 x 108 m/s
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Relativity
E = m c2
thus at c,
E = m
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Relavitity
All motion is relative
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Time Dilation
Time is relativeTwin paradox
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Fitzgerald-Lorentz contraction
€
L' = Lo 1−v2
c2
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Relativistic Mass
€
m' = mo
1−v2
c2
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Relativistic Time
€
to = t'
1 - v2
c2
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Gravity Effect