Imagination is a powerful tool. It allows you to create something that doesn't exist. It is also the foundation for what I call the creative force — the ability to invent a new reality. In this column and the one next month, I’ll show you how some simple techniques will help bring your mental images to life. True, some people are more imaginative than others, but we all can be on the lookout for appropriate base images from which our “hybrids” can spring forth.Astronomy magazine subscribers can read the full column for free. Just make sure you're registered with the website.