The Hubble Deepfield is one of the most inspiring images ever captured. It
reveals humanity's most distant view of the Universe. The orbiting Hubble
was pointed for ten days at a single spot in the sky. The background
"noise" you see upon close examination of this image is not image
defects--you are seeing dim and distant galaxies.
Galaxies like colorful pieces of candy fill the Hubble Deep Field - one of humanity's most distant optical views of the Universe.
The dimmest, some as faint as 30th magnitude (about four billion times fainter than stars visible to the unaided eye), are very distant galaxies and represent what the Universe looked like in the extreme past, perhaps less than one billion years after the Big Bang. To make the Deep Field image, astronomers selected an uncluttered area of the sky in the constellation Ursa Major (the Big Bear) and pointed the Hubble Space Telescope at a single spot for 10 days accumulating and combining many separate exposures. With each additional exposure, fainter objects were revealed. The final result can be used to explore the mysteries of galaxy evolution and the infant Universe.
Credit: R. Williams, The HDF Team (STScI), NASA