Spitzer and Hubble Space Telescope Create Colourful Masterpiece. Thousands of stars are forming in the cloud of gas and dust known as the Orion nebula. More than 3,000 stars of various sizes appear in this image. Some of them have never been seen in visible light. Credit: NASA, ESA, and the Hubble Space Telescope Heritage Team (STScI/AURA) (NASA Media Archives).