Our galaxy is shaped roughly like a watch, round and flat. If you could get above it and look down on it, it would look like an immense watch. But we are inside the galaxy, and when we look up we are looking towards the edge from inside the “watch.” So we see that edge curving around us. And since there are millions of stars in it, we see it as the Milky Way. You will be surprised to know that there are atleast 3,000,000,000 stars in the galaxy and here is an idea of its size. It takes eight minutes for light from the sun to reach the earth. For light from the center of the galaxy to reach the sun, it takes about 27,000 years. The galaxy rotates about its center like a wheel from our position in it; it takes about 200,000,000 years just to make one revolution.