Why are we on Earth able to see only a relatively small part of the Milky Way galaxy?

Well, honey, it's all due to the dusty heart of our galaxy blocking our view - talk about being a cosmic cockblocker, right? Also, there's that pesky thing called distance - the Milky Way is a whopping 100,000 light-years wide, so seeing it in all its glory from one little corner of the universe is like trying to admire a painting while you're stuck in a broom closet. Tough luck, spaceman!