Here's why:
* Equatorial Mountings: These mounts are designed to compensate for the Earth's rotation, allowing the telescope to track celestial objects as they move across the sky.
* Celestial North Pole: This is the point in the sky directly above the Earth's North Pole. All stars in the northern hemisphere appear to rotate around this point.
* Sidereal Drive: This mechanism rotates the telescope at the same rate as the Earth's rotation, but in the opposite direction. This keeps the telescope pointed at a specific star or object.
By pointing the sidereal drive axis towards the celestial north pole, the telescope can track objects as they appear to circle around this point. This ensures that the object remains centered in the telescope's field of view as the Earth rotates.