The equator is the point from which the latitude is calculated. In other words, it is the 0° latitude line. A pole consists of two points: North Pole and South Pole. The North Pole lies 90° on the north of the...

The axis is an imaginary line through both the north and south poles on which the Earth rotates. The equator is from the point that the latitude is calculated. In other words, it is the 0° latitude line.

The axis is an imaginary line through both north and south poles about from which the Earth rotates. An orbit is a curved path that is taken by an object around a star, planet, moon, etc.

Nebula is a cloud in deep space consisting of gas or dirt/dust (e.g. cloud formed after a star explodes). Solar Nebula is the cloud of gas and dust that began to collapse about 5 billion years ago to form the...

Nebula is a cloud and dust in space. Molecular cloud is a type of nebula. The formation of molecules is permitted due to its density and size.