Our home galaxy, The Milky Way, is about 100,000 light years across. That's one quintillion kilometers: a one followed eighteen zeros. There are likely between 100 and 400 billion stars in it and perhaps as many earth-sized planets. If it were reduced to only 100 meters across, our solar system would be reduced within it to the relative size of a grain of sand. The galaxy's immensity is mind-boggling. Yet for an hour after sunset last night I could see more than half of it from the edge of a small potato field on Prince Edward Island. Nifty! - MattMills