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Images: A Detail of the Subaru Deep Field
The section shown here is just 10% of the Subaru Deep Field, with 22 out of 150 supernovae. Each point of light in the image is a galaxy, consisting of tens of billions of stars (except for the few bright spots that are nearby Milky-Way stars).

Every triplet of frames zooms in on one event, showing the galaxy before the explosion, with the supernova in progress, and in a digital "difference image" that isolates the light from the supernova.

Full-size image without supernovae (JPEG - 981 kB)

Full-size image with supernovae (JPEG - 906 kB)