Published on Sep 26, 2012
http://www.facebook.com/ScienceReason ... Hubble eXtreme Deep Field - Farthest Ever View of the Universe. Hubble goes to the eXtreme to assemble farthest ever view of the Universe. Hubble eXtreme Deep Field (XDF) pushes back the frontiers of time and space.
This video explains how astronomers meticulously assembled mankind's deepest view of the universe from combining Hubble Space Telescope exposures taken over the past decade. Guest scientists are Dr. Garth Illingworth and Dr. Marc Postman.
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Like photographers assembling a portfolio of best shots, astronomers have assembled a new, improved portrait of mankind's deepest-ever view of the universe. Called the eXtreme Deep Field, or XDF, the 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 Field.
The XDF is a small fraction of the angular diameter of the full Moon. The Hubble Ultra Deep Field is an image of a small area of space in the constellation Fornax, created using Hubble Space Telescope data from 2003 and 2004. By collecting faint light over many hours of observation, it revealed thousands of galaxies, both nearby and very distant, making it the deepest image of the universe ever taken at that time.
The new full-color XDF image reaches much fainter galaxies and includes very deep exposures in red light from Hubble's new infrared camera, enabling new studies of the earliest galaxies in the universe. The XDF contains about 5,500 galaxies even within its smaller field of view. The faintest galaxies are one ten-billionth the brightness of what the human eye can see.
Flight Through the Hubble eXtreme Deep Field
This scientific visualization depicts a flight through the galaxies in the Hubble eXtreme Deep Field (XDF). Using measured and estimated distances for approximately three thousand galaxies, astronomers and visualizers constructed a three-dimensional model of the XDF galaxy distribution. The camera traverses more than thirteen billion light-years of space. For cinematic reasons, the exceedingly vast distances in the 3D model have been greatly compressed.
Science Credit: G. Illingworth, P. Oesch, and D. Magee (University of California, Santa Cruz)
Flight Through the Hubble eXtreme Deep Field (2D Zoom and 3D Fly-Through Sequence)
This video begins with a zoom into the small area of sky that the Hubble Space Telescope observed to construct the eXtreme Deep Field, or XDF. The region is located in the southern sky, far away from the glare of the Milky Way, the bright plane of our galaxy. In terms of angular size, the field is a fraction the angular diameter of the full Moon, yet it contains thousands of galaxies stretching back across time.
The video then depicts a flight through the galaxies in the XDF. Using measured and estimated redshifts for approximately three thousand galaxies, astronomers and visualizers constructed a three-dimensional model of the XDF galaxy distribution. The camera starts from Hubble's viewpoint, traverses more than thirteen billion light-years of space, and exits the data set past a "red dot" galaxy (or proto-galaxy) with a redshift of 7.82. For cinematic reasons, the exceedingly vast distances in the 3D model have been greatly compressed.
XDF Moon Comparison Video
This video compares the angular size of the XDF field to the angular size of the full Moon. The XDF is a very small fraction of sky area, but it provides a "core sample" of the heavens by penetrating deep into space over a sightline of over 13 billion light-years. Several thousand galaxies are contained within this small field of view. At an angular diameter of one-half degree, the Moon spans an area of sky only one-half the width of a finger held at arm's length.
Credit: NASA, ESA, and M. Estacion, G. Bacon, L. Frattare, Z. Levay and F. Summers (STScI)
Tags: hubble extreme deep field xdf ultra udf space telescope galaxies universe video 3d fly-through nasa
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