June 4, 2009
What is this apparatus called and what is the technique originially introduced by this apparatus used for?
Cracked by: Kamal Rathi , Rahulk , Raghuvansh , lordmaldy , varuns88 , Logik , Dibyo , Rogi and Joshan.
Thats the Blink comparator originally used to find Pluto. The same technique is used even now to find new planets/asteroids.
Simple and works :)