Stars and Constellations Physics 113 Goderya Chapter(s): 2 Learning Outcome:
OBSERVING THE SKY Chapter 1 Chapter 3 Constellations and Navigation Constellations and Navigation...
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Transcript of OBSERVING THE SKY Chapter 1 Chapter 3 Constellations and Navigation Constellations and Navigation...
OBSERVING THE SKYOBSERVING THE SKYOBSERVING THE SKYOBSERVING THE SKY
Chapter 1Chapter 1Chapter 3Chapter 3
ConstellationConstellations and s and NavigationNavigation
ORIGINS OF ASTRONOMYORIGINS OF ASTRONOMYORIGINS OF ASTRONOMYORIGINS OF ASTRONOMY
FLASHCARDFLASHCARDFLASHCARDFLASHCARD
Let’s say we find a star that is located on the Let’s say we find a star that is located on the points or circles in the sky listed below.Then points or circles in the sky listed below.Then on the same night we move to a location that on the same night we move to a location that is some significant distance from our first is some significant distance from our first location. There will now be a different star onlocation. There will now be a different star on
A)A) the celestial north polethe celestial north pole
B)B) the zenith the zenith
C)C) the celestial equator the celestial equator
D)D) all of the above all of the above
STAR TRAILS NEAR THE STAR TRAILS NEAR THE POLEPOLE
STAR TRAILS NEAR THE STAR TRAILS NEAR THE POLEPOLE
INTERMEDIATE LATITUDE INTERMEDIATE LATITUDE STAR TRAILSSTAR TRAILS
INTERMEDIATE LATITUDE INTERMEDIATE LATITUDE STAR TRAILSSTAR TRAILS
FLASHCARDFLASHCARDFLASHCARDFLASHCARD
Imagine Canadian troops are stationed in a country Imagine Canadian troops are stationed in a country located on the equator. Which of the following would located on the equator. Which of the following would be familiar to them (the same at the equator as in be familiar to them (the same at the equator as in Canada)?Canada)?
A)A) the celestial poles are on the north andthe celestial poles are on the north andsouth points of the horizonsouth points of the horizon
B)B) the celestial equator is overhead and the celestial equator is overhead and passes through the zenithpasses through the zenith
C)C) all stars rise and set all stars rise and set
D)D) none of the above are the same on the none of the above are the same on the equator as in Canada equator as in Canada
FLASHCARDFLASHCARDFLASHCARDFLASHCARD
ALL CONSTELLATIONS NORTH OF WHAT ALL CONSTELLATIONS NORTH OF WHAT LATITUDE ARE CIRCUMPOLAR FROM LATITUDE ARE CIRCUMPOLAR FROM VANCOUVER?VANCOUVER?
(Latitude of Vancouver is 49 degrees)(Latitude of Vancouver is 49 degrees)
A)A) 0 degrees0 degrees
B)B) 41 degrees 41 degrees
C)C) 49 degrees 49 degrees
D)D) 90 degrees 90 degrees
ORIGINS of ASTRONOMYORIGINS of ASTRONOMYORIGINS of ASTRONOMYORIGINS of ASTRONOMY
ConstellationConstellations and s and NavigationNavigation
ConstellationConstellations and s and TimekeepingTimekeeping Daily rotation of
sky is a unit of time = 1 day
FLASHCARDFLASHCARDFLASHCARDFLASHCARD
FOR ABOUT HOW LONG WAS THE CAMERA FOR ABOUT HOW LONG WAS THE CAMERA OPEN IN THIS PICTURE?OPEN IN THIS PICTURE?
A)A) 30 seconds30 seconds
B)B) 5 minutes 5 minutes
C)C) 2 hours 2 hours
D)D) 5 hours 5 hours
The Spinning EarthThe Spinning EarthThe Spinning EarthThe Spinning Earth
How do we know that the Earth is How do we know that the Earth is spinningspinning
on its axis?on its axis?
Is it not possible that the Earth does Is it not possible that the Earth does not spinnot spin
and the sky spins around the Earth?and the sky spins around the Earth?
EARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXIS
Evidence of Evidence of Earth’s SpinEarth’s SpinDaily rotation of Daily rotation of
Celestial SphereCelestial Sphere
EARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXIS
Evidence of Evidence of Earth’s SpinEarth’s SpinDaily rotation of Daily rotation of
Celestial SphereCelestial Sphere
Foucault PendulumFoucault Pendulum
EARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXIS
Evidence of Evidence of Earth’s SpinEarth’s SpinDaily rotation of Daily rotation of
Celestial SphereCelestial Sphere
Foucault PendulumFoucault Pendulum
Velocity of Moon at Velocity of Moon at Rising and SettingRising and Setting
FLASHCARDFLASHCARDFLASHCARDFLASHCARD
AT WHAT TIME DOES THE WAXING AT WHAT TIME DOES THE WAXING CRESCENT MOON SET?CRESCENT MOON SET?
A)A) 9:00 AM9:00 AM
B)B) 3:00 PM 3:00 PM
C)C) 9:00 PM 9:00 PM
D)D) MIDNIGHT MIDNIGHT
FLASHCARDFLASHCARDFLASHCARDFLASHCARD
AT WHAT TIME DOES THE FIRST QUARTER AT WHAT TIME DOES THE FIRST QUARTER MOON RISE?MOON RISE?
A)A) 9:00 AM9:00 AM
B)B) NOON NOON
C)C) 9:00 PM 9:00 PM
D)D) MIDNIGHT MIDNIGHT
EARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXIS
Evidence of Evidence of Earth’s SpinEarth’s SpinDaily rotation of Daily rotation of
Celestial SphereCelestial Sphere
Foucault PendulumFoucault Pendulum
Velocity of Moon at Velocity of Moon at Rising and SettingRising and Setting
ECLIPSE GEOMETRYECLIPSE GEOMETRYECLIPSE GEOMETRYECLIPSE GEOMETRY
NewNewNewNew
NewNew
NewNew
55ºº
FullFullFullFull
FullFull
FullFullEarth’s OrbitEarth’s Orbit
FLASHCARDFLASHCARDFLASHCARDFLASHCARD
WHAT IS THE SHORTEST POSSIBLE PERIOD WHAT IS THE SHORTEST POSSIBLE PERIOD OF TIME BETWEEN A SOLAR AND A LUNAR OF TIME BETWEEN A SOLAR AND A LUNAR ECLIPSE?ECLIPSE?
A)A) 1 Day1 Day
B)B) 1 Week 1 Week
C)C) 2 Weeks 2 Weeks
D)D) 1 month 1 month
EARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXIS
Evidence of Evidence of Earth’s SpinEarth’s SpinDaily rotation of Daily rotation of
Celestial SphereCelestial Sphere
Foucault PendulumFoucault Pendulum
Velocity of Moon at Velocity of Moon at Rising and SettingRising and Setting
Long Range ProjectilesLong Range Projectiles
EARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXISEARTH SPINS on its AXIS
Evidence of Evidence of Earth’s SpinEarth’s SpinDaily rotation of Daily rotation of
Celestial SphereCelestial Sphere
Foucault PendulumFoucault Pendulum
Velocity of Moon at Velocity of Moon at Rising and SettingRising and Setting
Long Range ProjectilesLong Range Projectiles
Prevailing Wind Prevailing Wind CirculationCirculation
CONCLUSIONS REGARDING CONCLUSIONS REGARDING SPIN of EARTHSPIN of EARTH
CONCLUSIONS REGARDING CONCLUSIONS REGARDING SPIN of EARTHSPIN of EARTH
Earth rotates once per Earth rotates once per day from west to east day from west to east (counter-clockwise as (counter-clockwise as seen from above the seen from above the north pole) about an north pole) about an axis that passes axis that passes through the north and through the north and south poles. south poles.
Celestial sphereCelestial sphere
North North celestial polecelestial pole
South South celestial polecelestial pole
Celestial equatorCelestial equator