Just to change things up a bit, here's one of my more recent science-fiction space paintings.
View on approach to a warm, soggy world covered with shallow oceans and vast tidal estuaries. The world has little geological activity, and slow erosion has reduced the planet's land masses to swamps and low-lying hills. Vegetation covers the landscape beneath the perpetual fog banks and slow rolling, drizzly cloud formations. While rather hot and soggy, this planet is full of life and worthy of exploration.
Created in Photoshop Elements 10: