Above, the extrasolar planet 16 Cygni Bb as rendered by artist Ron Miller, illustrator of science, astronomy, and science fiction, and author of "The Art of Space: The History of Space Art, from the Earliest Visions to the Graphics of the Modern Era."
Below, Jupiter's moon Europa.
See more of Miller's otherworldly artwork at this LIFE gallery: Out of This World: Ron Miller's Spectacular Space Art