They are the crown jewels of the galaxy. Neither stars, planets, moons or asteroids, they are the mysterious clouds of gas we call Nebulas. Nearly invisible to the naked eye, astronomers use the most sophisticated techniques to tease images of these fascinating phenomena from the dark sky. When revealed in their full glory, they glow, reflect or obscure the galaxy's light. They amaze us with swirls of color in sizes and shapes that are nothing less than stunning. They mark the regions where the nothingness of space first coalesces, where stars are born and where stars die. Take a tour through the Art Gallery of the Galaxy as "Universe" opens its exhibit on the "Nebulas."