"I am your home galaxy yet you will never see all of me. I contain over two hundred billion stars. You can see a slice of me on a clear dark night as a band of light. What am I?"

Answer: The Milky Way. The Milky Way is our home galaxy, containing an estimated 200-400 billion stars. We are located about 26,000 light-years from its centre. On a clear night far from light pollution, the galactic disc is visible as a pale band across the sky.