The term MILKY WAY is composed of two words: GALAXY (6 letters) and UDDER (5 letters). The term MILKY WAY is a name for our GALAXY, the Milky Way. It is a spiral GALAXY that contains our Solar System and is estimated to contain between 200 and 400 billion stars. The term MILKY WAY is derived from the appearance of the GALAXY in the night sky, which appears as a milky band of light. The term UDDER is used to describe the mammary glands of female animals, such as cows, which produce milk. This is likely where the term MILKY WAY originated, as the Milky Way appears in the night sky like a milky stream of light.