A nebula may just be an interstellar cloud of dust and gas, but it is also one of the most spectacular sights to be seen through a telescope! Nebulae (pronounced: NEB-you-lee) pepper the galaxy with beautiful colors, shapes, and lights. Learn more about this celestial phenomena, including the four major types of nebulae and see images of some of the most famous and noteworthy nebulae on record in this peaceful and educational video.