What is precession? how does it affect our view of the sky?

It affects our view of the sky because it changes the constellations associated with solstices and equinoxes. Since those two correspond to points on the Earth's orbit, which depend on the direction the axis points to in the space, the positions in the orbits gradually shift along Earth's orbit. 

~ {Hope this helps} ~

These are resources that cannot be renewed after used. examples include coal petrolium and gas