how do i making copys of the same object?

I currently have a Gameboy shaped device I made that has a oled screen a directional pad and 2 buttons (as well as a large speaker) and Ive been programing simple games on it like pong and such but I was thinking about making a shooter game say something like asteroids... I have in the past seen it done where multiple of say a bullet are copied but how do I then apply physics to each one with out coding each individual bullet separately?

Make an array of bullet objects.

aah I see.... well I've avoided learning arrays for 6 years I better learn now then...