heliocentric and geocentric systems
TRANSCRIPT
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HELIOCENTRIC vsGEOCENTRIC Systems
#frame of reference
A P R E S E N TATIO N B Y – PAWAN R AM A M AL I
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Ancient Observations
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Geocentric Theory
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Heliocentric Theory
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Apparent motion of Marsagainst "fixed" stars
5
1
2
3
4
56
7
12
3
4
5
67
Earth
Mars
*
*
***
*
January
July
Retrograde Motion of Planets
Planets sometimes appear to loop back -retrograde motion
Loops are called "epicycles"
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Frame of reference
• Required for performing survey operations.
• Also known as control points or stations
• These points are determined with respect to certain
coordinate systems.
• Defined by its axes and origin .
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P (x, y)
X
Y
x
y
O
(X, Y, Z) P
O
X
Y
Z
Y
X
Z
Coordinate System
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Geocentric frame of reference
Greenwich Meridian
Equator
Earth Surface
X
Y
Z
(X, Y, Z)
XY
Z
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Geocentric frame of reference
Greenwich Meridian
Equator
Earth Surface
X
Y
Z
P
h
),,( h
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Celestial frame of reference
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Horizontal coordinate system
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Equatorial coordinate system
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Equatorial coordinate system
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Ecliptic coordinate system
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Heliocentric ecliptic coordinates
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Galactic coordinate system
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Galactic coordinate system
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Super-galactic coordinate system
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CELESTIA
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Thank You
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