This infrared image from NASA's Spitzer Space Telescope shows the Orion Nebula, the closest massive star-making factory to Earth. Spitzer surveyed a significant swath of the Orion constellation, beyond what is highlighted in this image. Within that region, called the Orion cloud complex, the telescope found 2,300 stars circled by disks of planet-forming dust and 200 stellar embryos too young to have developed disks.
NASA / JPL-Caltech / Univ. of Toledo