 The red rectangle is one of the most unusual nebula known in the Milky Way because of its rectangular shape. This unique planetary nebula resembles the head and thorax of a garden variety ant. It has intriguing symmetrical patterns. It could be that there is a binary star system at the heart of the nebula creating the symmetrical patterns. My favorite, and one of the most beautiful of all celestial objects, this planetary nebula looks like a delicate butterfly. But it is far from serene. What resembles dainty butterfly wings are actually rolling cauldrons of gas heated to more than 36,000 degrees Fahrenheit, tearing across space at more than 966,000 kilometers per hour. It's 600,000 miles per hour.