Transcript Celestial Sphere part 2

THIS PRESENTAION HAS BEEN RATED
TG-13
TEACHERS’ GUIDANCE STRONGLY ADVISED
Some Material May Be Unintelligible For Students Under 13.
Intense Frames of Scientific Instruction, Analysis, Comparing
and Contrasting, Description, and for Some Vocabulary.
BY THE
CLASSIFICATION AND RATING ADMINISTRATION
© 1852 All Rights Reserved
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© 1852 All Rights Reserved
VOID WHERE PROHIBITED BY LAW
ASTRONOMY
The Night Time Sky
The Celestial Sphere
OBJECTIVES
By the end of this presentation, students will
be able to…
• Contrast the differences between
circumpolar, equatorial, and zodiac
constellations.
• Explain the use of asterisms in identifying
the constellations.
Zenith
o
North Celestial Pole
+
Noon/Midnight Meridian
6 a.m. Meridian
Celestial Equator
6 p.m Meridian
East
North
o
South
West
The position of the observer on the earth,
and the seasons, determine what
stars
are
+
visible on the celestial sphere.
South Celestial Pole
o
Nadir
o
+
To identify locations
in the sky more easily, the
celestial sphere is divided into 88 regions
called constellations.
East
o
West
A CONSTELLATION is an area of the night
sky assigned to a particular configuration
of
+
stars.
o
o
ASTERISM – +the bright pattern of stars within
the constellation.
East
o
West
Constellations were originally used as
navigational aides and for marking
the
+
seasons.
o
o
+
Some constellations
would lie along the
celestial equator, like Orion
and Canis Major.
East
o
West
+
or like Ophiuchus and Serpens.
o
o
+
In the Winter, Orion
and Canis Major are
hunting high in the southern sky.
East
o
West
+
Ophiuchus and Serpens lie far below the
northern horizon.
o
o
+ Ophiuchus wrestles with
In the Summer,
Serpens high in the southern sky.
East
o
West
+
Orion and Canis Major rest far below the
northern horizon.
o
o
+
Some constellations
will circle around the
celestial pole, like Ursa
Major, Ursa Minor and
Cassiopeia.
East
o
West
These are circumpolar stars
and constellations.
o
+
o
+
A careful observer
will be able to identify the
constellation the sun is in just as the sun
sets or rises.
East
o
West
Making such observations every night, the
observer will be able to trace the+ path the
sun moves through the stars throughout the
year.
o
o
The ECLIPTIC+ is the apparent annual path
of the sun in the night sky.
East
o
West
The location of the ECLIPTIC varies from
23½° north of the Celestial Equator
to
23½°
+
south of the Celestial Equator.
o
o
+ the line of constellations that
The ZODIAC is
are found along the ecliptic.
East
o
West
The location of ZODIAC constellations
varies from 23½° north of the Celestial
+
Equator to 23½° south of the Celestial
Equator.
o
The ZODIAC includes
Aries, Taurus, Gemini, Cancer, Leo,
Virgo, Libra, Scorpio, Sagittarius, Capricorn,
Aquarius, Pisces.
The ram, the bull, the heavenly twins,
Next the crab, and the lion grins,
The virgin and the scales we note,
The scorpion, archer, and the goat,
The man who holds the watering-pot,
And last the fish are not forgot.
ASTRONOMY
The Night Time Sky
The Celestial Sphere