The Hubble Ultra Deep Field is one of, if not the most, famous picture the Hubble Space Telescope has taken. Objects in this image are up to 13-bililon light-years from Earth and it reveals a comprehensive timeline for the universe. Between September 2003 and January 2004, Hubble looked at a seemingly empty patch of sky, inside the constellation Fornax, only a tenth of the size of the full moon. It came back with a stunning picture containing over 10,000 galaxies (and pretty much all of them are galaxies containing thousands, millions, or billions of stars). This means that the image reveals trillions upon trillions of stars. Moreover, some of the galaxies are mature, but others are brand-new – being only 600 million years old.
Frequently, this image is posted and will have the caption "Every spec of light in this picture is a whole galaxy," or "There are lots of galaxies here," or "That's cool" (but with more caps-lock). What are you really looking at? The first step to understanding the sheer magnitude of how awesome this image is to, well, understand what you can actually see.
So, look around the image (especially if you can find a nice big high resolution one you can zoom around with). This image shows a timeline of the formation of galaxies from some of their earliest moments of the universe, it also reveals some of the largest modern monsters that we have today. Ultimately, this pohot also helps us to see and understand the incredible vastness of our universe.
It is a rather stunning picture.
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