Hubble deep field north - Hubble Deep Field North - North of the constellation of...

Hubble deep field north - Hubble Deep Field North - North of the constellation of the Great Bear, the Hubble space telescope posed 75h to obtain this image of the distant universe. More than 1500 galaxies distant from 1 to 12 billion years - light are visible in this image. From Earth, the target field is the one “” that one would see through the eye of a needle held at arm's length.” If the distribution of galaxies over the entire Celestial vault were similar to this field, the number of galaxies observable up to magnitude 30 would be 50 billion. Representing a narrow “” keyhole”” view all the way to the visible horizon of the universe, the HDF image covers a speck of sky 1/30th the diameter of the full Moon. This is so narrow, just a few foreground stars in our Milky Way galaxy are visible and are vastly outnumbered by the menagerie of far more distant galaxies, some nearly as faint as 30th magnitude, or nearly four billion times fainter than the limits of human vision. Although the field is a very small sample of sky area it is considered representative of the typical distribution of galaxies in space because the universe, statistically, looks the same in all directions. The image was assembled from many separate exposures with the Wide Field and Planetary Camera 2 for ten consecutive days between December 18 to 28, 1995