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Hubble Legacy Field
The Image of the Universe?: Image
The most incredible image ever produced by the Hubble telescope or potentially in general by anything was revealed recently. It is an image of various galaxies and stars that create a stunning and beautiful view of the night skies. However, what exactly is this image? Moreover, what does it represent and why is it absolutely mindblowing?
Firstly, this is an image that was recently reconstructed using Hubble data. Nonetheless, to understand the creation of this image, we will have to go back 24 years to 1995. The story begins here when scientists decided to see how much they could push Hubble. Thus, they decided to stare at the same spot for about ten days and recorded all of the data. All this data was reconstructed in a single image known as the Hubble Deep Field. This image was the epithet of Hubble’s possibilities and its potentials of seeing far away. It was essentially an image that showed us a very dark time, billions of years ago. It was a look into the universe’s history.
Nevertheless, the scientists were not satisfied with that just yet and they decided to push it further. Hence, for a few decades, scientists have kept pushing it more and more, looking at different locations and discovering new things with this incredible telescope. This was back in 1995 and since then, over 20 years have passed; we have collected tons of data from Hubble.
This is when scientists decided to create something new. They decided to combine all of the data from the decades and focus on a single spot in the skies. They have picked a location in the skies that were approximately the same size as the full moon. Then, by combining all the data including ultraviolet, infrared, and x-ray data into a single image, they were able to create this new image with 7,500 different exposures. The image actually represents 31 different Hubble programs that were initiated over a period of about 16 years. Overall, this whole image was almost as if we looked at the same spot for about eight months!
The Image of the Universe?: Text
Target area of the night sky
The Image of the Universe?: Image
This image is called the Hubble Legacy Field. It contains over 265,000 galaxies which can be visible by zooming into each section of the image. Everything in the photo represents history. It is similar to looking back in time billions and billions of years ago even though it is a single image. It may not look this way and as a matter of fact, it might not even make sense at first, until you zoom in to the tiny spots. When you really zoom in and start looking at the small spots, you will notice that each of them represents a huge galaxy with billions or even trillions of different stars. Furthermore, the most surprising fact is that the image is real. It is not an image that was simulated or generated and all of this is the reality. The image shows the night skies that contains over 260 thousand different galaxies in only the size of our moon!
The Image of the Universe?: Text
Different Galaxies
The Image of the Universe?: Image
This picture above makes the concept much clearer. The image here shows various galaxies that are in the Hubble Legacy Field. Their age is also listed to illustrate how old some of the galaxies are. For example, the image in the bottom right corner is only about 500 million years after the creation of the universe. It is ridiculously far away and old; hence, it is considered a red-shift galaxy (which I will explain more below). The more recent galaxies are at the top. This illustrates how a single image contains all of the times in history. This image is really effective in trying to explain what is really happening right here and how all of this represents the history of time.
The Image of the Universe?: Text
Short interesting clip of the Image
The Image of the Universe?: Video
So far, this is the most accurate and detailed image ever produced by anything. It shows us the transformations of the universe through time. It is also interesting since all of the effects we expect the galaxies to have are visible in the image. For instance, when we zoom into the night sky, it is predicted that at a certain distance, the galaxies start turning more yellow and eventually redder. This effect is called a red-shift. Due to the expansion of the universe and the stretching of space, an increasing amount of galaxies are being red-shifted and are currently traveling away from us at immense velocities. When we zoom in the Hubble Legacy Field and take a look at some of the farther galaxies, it is possible to notice that just like the theory predicted about red-shifts, there are indeed redshift galaxies that are orange and red. This also proves that the universe is expanding and is expanding really fast. The farther away from us, the more red-shift a galaxy gets; thus, some of the galaxies that are visible in the image are very old.
The Image of the Universe?: Text
The Image of the Universe?: Video
The fact that this image exists is very mindblowing. Moreover, it is neither a simulation or a recreation which makes this image far more interesting. It is the best image of the universe and will be for at least the next few years.
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Check this link out to get a higher resolution image of the Hubble Legacy Field: http://hubblesite.org/image/4492/news
The Image of the Universe?: Text
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