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 ...

Today, I want to talk about the equatorial coordinate system ... If we project Earth’s equator and poles onto the celestial sphere, we get the celestial equator and the north and the south ...

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 ...