Not BUILDINGS but INSTRUMENTS-II

In continuation to my previous article Not BUILDINGS but INSTRUMENTS-I

Let’s unfurl the next MAHA YANTRA!!!
                                   
                                            Is death a necessity to see heaven?
Well if your answer is YES then you must not have seen JAI PRAKASH YANTRA at Jantar Mantar an instrument made by Jai Singh II  which mirrors the location of above heavenly bodies in the sky.

3 exotic features are:

1. Two different coordinate measurement systems for taking observation
2. Observer can go inside the instrument via 5 passages though stairs
3. Consists of two hemispherical cavities as shown above set in the ground which are Complementary: if u put together they would form one complete hemisphere, which would be a map of heaven.

The 2 coordinate measurement systems in JAI PRAKASH YANTRA are:

Before that remember

                 “it is supposed that earth is surrounded by an infinite radius sphere called celestial sphere“

1. Horizontal Coordinate System

uses the observer’s local horizon as the fundamental plane thus dependent on the observer’s latitude and longitude
the position of an object on the celestial sphere at a particular time is given by its:

• Altitude- the angular distance above the horizon which can lie between 0^o (indicating it is on the horizon) and 90^o at the Zenith (or -90^o Nadir).
• Azimuth- the angular distance measured east from north changes from 0^o for an object (due North) to 90^o (due East) to 180^o (due South) to 270^o (due West).

2. Celestial Equatorial Coordinate System
 
                                                            Ek zaruri suchna for this system
                  Celestial Equator is the line coplanar with the earth’s equator (90° to the axis of rotation)
                 North Celestial Pole is directly above the earth’s north pole and likewise for the South Celestial Pole
the position of an object on the celestial sphere at a particular time is given by its:

• Declination (DEC)- measured from the celestial equator extends from 0° at the celestial equator to +90° at the North Celestial Pole and from 0° at celestial equator to -90° at the South Celestial Pole.
  
• Right Ascension (RA)- analogous to longitude with the Vernal Equinox Point ( The point at which the ecliptic intersects the celestial equator, the sun having a northerly motion) as zero reference point. It is recorded in terms of hours, minutes, and seconds with east as the direction of increasing right ascension.
  

Asaan bhasha mein bole toh…

            360° on celestial equator= 24 hours

so, 1 hour of RA = 15°

Jai singh II had both these coordinates engraved on Jai Prakash Yantra which gave a high degree of accuracy for locating all the heavenly bodies.
How measurements are taken???
Kisne socha tha ki
                                 we can go inside instruments for taking observations …
Well in Jai Prakash Yantra you can!
Cross wires were stretched from east to west and north to south the intersection of the wires holds a metal plate with circular opening directly over the center of the bowl. The shadow falling in the cavity indicated the position of the sun in the heavens.

Other heavenly bodies can be directly observed from the well of the instrument. This is done by looking upward from the appropriate point on the graduated inscription and observing the passage of the body across the intersection of the wires using the metal plate.

Agli baar Gf bole ki taare tood ke layo toh….

Jantar Mantar le jana taaroo ki exact location dikha dena aur bolna

” Jannu taare zameen par”

Reference from jantar mantar: the science of indian conjecture, Jantar Mantar Bonnie G. MacDougall & Astronomical Observation S.D Sharma