Farthest Ever View of the Universe: Called the eXtreme Deep Field, or XDF, this photo was assembled by combining 10 years of NASA Hubble Space Telescope photographs taken of a patch of sky at the center of the original Hubble Ultra Deep
Hubble Ultra Deep Field 2014 - Astronomers using NASA's Hubble Space Telescope have assembled a comprehensive picture of the evolving universe — among the most colorful deep space images ever captured by the telescope. - Image Credit: NASA, ESA et al
The Hubble Extreme Deep Field, a combination of separate exposures by the orbiting observatory for a total of over two million seconds, or 23 days. Nearly every single object is a galaxy, a vast collection of billions of stars.