Image credit: NASA/JPL-Caltech/Harvard-Smithsonian
Uploader comment: Generations of stars can be seen in this infrared portrait from NASA's Spitzer Space Telescope. In this wispy star-forming region, called W5, the oldest stars can be seen as blue dots in the centers of the two hollow cavities (other blue dots are background and foreground stars not associated with the region).
February 14, 2013, 5:22 pm