The Deepest Ever View Of The Universe: Hubble Goes To The Extreme, 4 Videos
The Hubble Ultra Deep Field is an image of a small area of space in the constellation of Fornax (The Furnace), created using Hubble Space Telescope data from 2003 and 2004. By collecting faint light over one million seconds of observation, the resulting image 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-colour XDF image is even more sensitive than the original Hubble Ultra Deep Field image, thanks to the additional observations, and contains about 5500 galaxies, even within its smaller field of view. The faintest galaxies are one ten-billionth the brightness that the unaided human eye can see [1].
Magnificent spiral galaxies similar in shape to the Milky Way and its neighbour the Andromeda galaxy appear in this image, as do large, fuzzy red galaxies in which the formation of new stars has ceased. These red galaxies are the remnants of dramatic collisions between galaxies and are in their declining years as the stars within them age.
Peppered across the field are tiny, faint, and yet more distant galaxies that are like the seedlings from which today’s magnificent galaxies grew. The history of galaxies — from soon after the first galaxies were born to the great galaxies of today, like the Milky Way — is laid out in this one remarkable image.
Credit: NASA, ESA, G. Bacon (STScI) and F. Summers (STScI)
Hubble pointed at a tiny patch of southern sky in repeat visits made over the past decade with a total exposure time of two million seconds [2]. More than 2000 images of the same field were taken with Hubble’s two primary cameras: the Advanced Camera for Surveys and the Wide Field Camera 3, which extends Hubble’s vision into near-infrared light. These were then combined to form the XDF.
“The XDF is the deepest image of the sky ever obtained and reveals the faintest and most distant galaxies ever seen. XDF allows us to explore further back in time than ever before,” said Garth Illingworth of the University of California at Santa Cruz, principal investigator of the Hubble Ultra Deep Field 2009 (HUDF09) programme.
This image separates out the Hubble eXtreme Deep Field by the distances of objects within it.
Credit: NASA, ESA, G. Illingworth, D. Magee, and P. Oesch (University of California, Santa Cruz), R. Bouwens (Leiden University), Z. Levay (STScI) and the HUDF09 Team
The galaxies in the XDF are not close together — they lie along one long line of sight from Earth to the very edges of the visible Universe. The most distant objects within the XDF are more than 95% of the way back to the Big Bang, while a few stars in it are within the Milky Way.
In the left pane are objects whose light has taken less than 5 billion years to reach us. In the centre pane are objects whose light has taken 5 to 9 billion years to reach us. In the right pane are objects whose light has taken more than 9 billion years to reach us.
The Universe is 13.7 billion years old, and the XDF reveals galaxies that span back 13.2 billion years in time. Most of the galaxies in the XDF are seen when they were young, small, and growing, often violently as they collided and merged together. The early Universe was a time of dramatic birth for galaxies containing brilliant blue stars far brighter than our Sun. The light from those past events is just arriving at Earth now, and so the XDF is a time tunnel into the distant past when the Universe was just a fraction of its current age. The youngest galaxy found in the XDF existed just 450 million years after the Universe’s birth in the Big Bang.
Before Hubble was launched in 1990, astronomers were able to see galaxies up to about seven billion light-years away, half way back to the Big Bang. Observations with telescopes on the ground were not able to establish how galaxies formed and evolved in the early Universe.
Hubble gave astronomers their first view of the actual forms of galaxies when they were young. This provided compelling, direct visual evidence that the Universe is truly changing as it ages. Like watching individual frames of a motion picture, the Hubble deep surveys reveal the emergence of structure in the infant Universe and the subsequent dynamic stages of galaxy evolution.
The planned NASA/ESA/CSA James Webb Space Telescope (Webb telescope) will be aimed at the XDF, and will study it with its infrared vision. The Webb telescope will find even fainter galaxies that existed when the Universe was just a few hundred million years old. Because of the expansion of the Universe, light from the distant past is stretched into longer, infrared wavelengths. The Webb telescope’s infrared vision is ideally suited to push the XDF even deeper, into a time when the first stars and galaxies formed and filled the early “dark ages” of the Universe with light.
This image, called the Hubble eXtreme Deep Field (XDF), combines Hubble observations taken over the past decade of a small patch of sky in the constellation of Fornax. With a total of over two million seconds of exposure time, it is the deepest image of the Universe ever made, combining data from previous images including the Hubble Ultra Deep Field of 2002/3 and Hubble Ultra Deep Field infrared image of 2009.
The image covers an area less than a tenth of the width of the full Moon, making it just a 30 millionth of the whole sky. Yet even in this tiny fraction of the sky, the long exposure reveals about 5500 galaxies, some of them so distant we see them when the Universe was less than 5% of its current age.
The Hubble eXtreme Deep Field image contains several of the most distant objects ever identified.
Among these are:
UDFj-39546284, at a redshift of 10.3, is a candidate for the most distant galaxy yet discovered, though it is awaiting spectroscopic confirmation
Supernova Primo, at a redshift of 1.55, the most distant type Ia supernova ever observed
UDFy-38135539, at a redshift of 8.6, is the most distant galaxy to have had its distance independently corroborated with spectroscopy
UDFy-33435698, at a redshift of 8.6
Credit: NASA, ESA, G. Illingworth, D. Magee, and P. Oesch (University of California, Santa Cruz), R. Bouwens (Leiden University), and the HUDF09 Team
Credit: NASA, ESA, Z. Levay (STScI), T. Rector, I. Dell’Antonio/NOAO/AURA/NSF, G. Illingworth, D. Magee, and P. Oesch (University of California, Santa Cruz), R. Bouwens (Leiden University) and the HUDF09 Team
This video shows the small size of the Hubble eXtreme Deep Field in the night sky by comparing it to the size of the full Moon. Despite having less than one tenth of the width and 1% of the area of the Moon in the sky, the eXtreme Deep Field contains 5500 galaxies. ote that the Moon does not actually pass near the Hubble eXtreme Deep Field.
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.
Credit: NASA, ESA, and M. Estacion and G. Bacon (STScI)
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Now this – THIS is cool stuff – thanks for posting!
there is DEFINITELY other life out there somewhere.
The key is time.
Anyone wondered why it is called UNI-verse?(uni meaning one)
What you see out there is nothing but our one and only universe. Make trillions of snapshots over billions of years. Just like slides in your projector. Then you scatter all the trillions of snap shots in your room according to a prearranged order. Then you ask an ant(bound to one of the snapshots) if it may perceive the system in the seeming disorder.
Anyone who can refute the claim that “the multiple universes perceived are but still pictures of the same universe in different points of time gets” a cheesburger from me. I may add that the price of cheesburger in my country is equivalent to the value one hour of qualified work.
Since science of the last 60 years is ruled by the falsification paradigm, the claim of mine is true until proven false. And, take a deep breath, it is a far more simple solution to the problem then the multiverse nonsense so it doesn’t contradict the so precious Occam-lie either.
My english isn’t quite efficient so you might ask questions before getting my claim wrong and claiming the price falsely.
-lil’ worm
Stunning images, I can wait to see what we can see in 20 years from now, even 5.