Hubble Extreme Deep Field
Released on September 25, 2012, the XDF image compiled 10 years of previous images and shows galaxies from 13.2 billion years ago. The exposure time was two million seconds, or approximately 23 days. The faintest galaxies are one ten-billionth the brightness of what the human eye can see. Many of the smaller galaxies are very young galaxies that eventually became the major galaxies, like the Milky Way and other galaxies in our galactic neighborhood.
The Hubble eXtreme Deep Field, or XDF, adds another 5,500 galaxies to those discovered in the Hubble Ultra-Deep Field.
eXtreme Deep Field
XDF (2012) view - except for a few stars (which are bright and easily recognizable because only they have diffraction spikes), every speck of light is an entire galaxy - some of these are as old as 13.2 billion years - the observable universe is estimated to contain 200 billion galaxies.
XDF image shows mature galaxies in the foreground plane - nearly mature galaxies from 5 to 9 billion years ago - protogalaxies beyond 9 billion years.
- Moskowitz, Clara (September 25, 2012). "Hubble Telescope Reveals Farthest View Into Universe Ever". Space.com. Retrieved September 26, 2012.
- "Hubble Goes to the eXtreme to Assemble Farthest-Ever View of the Universe". NASA. 25 September 2012. Retrieved 26 September 2012.
- "New 'extreme' Hubble telescope shows deepest view yet of night sky". The Times of India. 26 September 2012. Retrieved 26 September 2012.
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