How did the HDF compare to the HUDF in terms of initial exposure duration?
Answer
The HDF utilized approximately 10 days of exposure, less than the HUDF's 11 days.
The initial Hubble Deep Field (HDF) effort was created after approximately 10 days of dedicated exposure time. In contrast, the successor image, the Hubble Ultra Deep Field (HUDF), required a longer, deliberate, and much deeper dive into the same region, accumulating light over nearly 11 days. This difference in exposure time was key to the HUDF's success in pulling in significantly fainter and more distant light that had been traveling for a greater proportion of the universe's age, leading to the detection of roughly three times the number of galaxies.
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