Telescopes are cool. They use a combination of mirrors and lenses to collect light and make it look bigger. It isn't much different than your reading glasses.
A telescope basically is a set of lenses, each with different properties. Placed together in a certain order they form an instrument that enlarges objects in the distance.
A telescope is a optical tool. It contains the concave lens and the convex lens. And through refraction and reflection, it could help you to observe faraway objects.
