What variety of galactic structures did the Hubble Deep Field (HDF) observation reveal in its cross-section of cosmic time?
Answer
Everything from mature spirals to faint, embryonic structures.
The Hubble Deep Field (HDF), even before the deeper HUDF, provided a stunning cross-section illustrating galactic evolution across cosmic time. This meant the image contained a diverse range of objects, documenting the universe's development. Specifically, the catalog included evidence of both mature, well-established systems, such as spiral galaxies, alongside the very faint, less developed systems described as embryonic structures, thereby capturing snapshots of galaxy formation in various stages.
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