When was the last time you looked up at the stars on a clear night? Since time immemorial, humans have looked to the night sky for their survival. It signalled when to harvest. And helped explorers navigate the seas. But these days, if you're in the bright lights of the city, you may have to travel far to see the Milky Way. Now, remote communities across Canada are looking to their dark skies for potential economic opportunities - something called "astrotourism."