It depends upon how you look at it. Cassiopeia may appear two-dimensional to us, but the stars that make up the constellation are always at different distances from the Earth. Though they may seem to be just a thumb’s width apart, in actuality they can be millions of light years from each other (and from us). If you research other constellations, you’ll find that each point of light may not be a star at all. Rather, it could be a nebula, another planet, or a galaxy full of stars–much like our own Milky Way. For more information, see the Telescopes issue of Kids Discover magazine.
