Q&A: General Astronomy and Space Science

Q:
Why is our galaxy called the milky way?

A:
Our galaxy is called "the Milky Way" because, before telescopes could resolve all the multitudes of stars that make up the Milky Way, people weren't sure what that fuzzy streak across the sky was made up of. That is, looking up at the night sky, the Milky Way looks like thin white-ish diffuse clouds (i.e. it looks "milky")
http://www.astro.wisc.edu/~dolan/constellations/mw/MilkyWay.html
When viewed through a telescope, however, one sees that this is effect is actually from the light of many, many faint stars combining together.
The following web page also has a nice answer to this question: Milky Way