A trip through the volumenized Hubble Ultra Deep Field
https://www.youtube.com/watch?v=2sUrauA0iq4
An amazing visualization of the farthest galaxies to explain how we can see back in time by just looking at one of the most remarkable photographs ever taken by humankind. And now think of this: From the farthest galaxies in this pictures, we can see just a fracture of their real light, because the light has redshifted into the infrared spectrum which the hubble space telescope couldn't even catch with its camera. The upcoming James Webb Space Telescope will be able to explicitly catch these infrared frequencies to observe the farthest galaxies and take even more spectacular photos of the first galaxies just after their ignition after the big bang.
