S.O. Celestial Sphere and its Points
Imaginary globe where Earth is at the centre and provides an easy way of describing position of objects in sky.
Apparent daily motion of the stars, caused by earth's rotation.
The point in the sky directly above the observer.
The apparent meeting of the sky and Earth. Marks the limit of a person's vision.
North, South, East and West are marked of the celestial sphere.
The imaginary line through the observer's zenith. This line divides the sky into two parts.
north celestial pole
The point at which the sky seems to rotate around. Polaris is the star closest to the north celestial pole. Polaris is above the north pole of Earth.
Apparent path the sun takes across the sky, but you know it is the Earth that is moving around the sun.
The Earth's equator projected out into space. This separates the sky (celestial sphere) into a northern & southern hemisphere.