I love stargazing and picking out constellations. This (as you probably know) is Orion, just about the most famous constellation there is. In the southern hemisphere, he appears upside down and dominates the summer night sky.
In this picture, the red star at the top is Betelgeuse (Orion's shoulder), the blue star bottom-right is Rigel (Orion's foot), and the three stars in a line are Orion's Belt.
So my second inspiration is just about anything to do with celestial phenomena -- stars, moon, solstices, eclipses, comets, meteorites . . . anything. They play a big part in my writing as well.