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Hubble Deep Field

(HDF, HDF-N, Hubble Deep Field North)
(highly-detailed image of a small region of the sky taken with HST)

The Hubble Deep Field (HDF) is an image of a small region of the sky (a survey field, within constellation Ursa Major) taken over a very long exposure with the Hubble Space Telescope aiming to image as distant galaxies as possible.

The HDF region of the sky has been studied at other wavelengths in order to associate other signal with the HDF visual images.

Since the HDF, the Hubble Deep Field South was made in 1998, the Hubble Ultra-Deep Field was made in 2003/2004 and the Hubble Extreme Deep Field in 2012.

(survey,galaxies,survey field)
HDFHDF 850.1Hubble Deep Field 

Referenced by:
astronomical survey
Chandra Deep Field North (CDFN)
Chandra Deep Field South (CDFS)
deep field (DF)
Hubble Deep Field South (HDF-S)
Molecular Deep Field