An eclipse occurs when one object gets in between you and another object and blocks your view. From Earth, we routinely experience two kinds of eclipses: an eclipse of the Moon and an eclipse of the Sun.

Friction is another force that is around us. Friction occurs whenever  two objects are in contact with each other. Friction slows things down, and stops some objects from starting to move. But it is also very useful. Smoother contact surfaces reduce the friction force.