Newly discovered fragments of 2,200-year-old star coordinates—once thought lost—reveal the incredible skill of the ancient astronomer Hipparchus. This colored version of a 19th-century ...

The celestial sphere is the imaginary globe around us. Ancient people believed the stars were fastened to it. credit: Holley Y. Bakich Today, I want to talk about the equatorial coordinate system.

So you in essence want theta and phi with axes through the centre of the sphere?<BR><BR>In which case I'd just translate your coordinates to put them through the centre of the sphere. If for any ...

case 1In 2D coordinate system the sum of the angles of all quadrants=360 degree= 2pi radianin (x,y) planeCase 2In 3D coordinate system (x,y,z) I took 3 possible planesi.e.(x,y) (y,z) (x,z)each ...