Answer:
The location of Earth in its orbit.
Explanation:
Orion is a constellation located on the celestial equator and is visible throughout the world.
The location of Earth in its orbit causes Orion to point out toward a particular shift during the winter evenings than it was in the summer evenings,Orion is affected because of the motion of the earth around the sun(i.e it rotation)this is why we can not see it all year long....
