The Hubble Deep Field photo, which is also

The Hubble Deep Field photo, which is also famous to the public, was not actually taken to take pictures of countless outer galaxies for the first time. It was a photo that could be obtained because an astronomer who was trying to book a reservation with the Hubble Space Telescope applied to take a "nothing coordinate."

It is now considered a great event that has increased the horizon of the world by thousands of times, but at the time, I was almost stopped for what kind of trash request this was. It is a very high-tech technology to keep the orbiting space telescope looking somewhere, but people thought it would not be possible to waste time and manpower staring into the air with a space telescope with a lot of work to do.

That's how humanity's first deep field picture came out, and mankind realized that the empty space was not empty at all.

Thousands of outer galaxies hundreds of millions or billions of light years beyond which no living thing, no great genius, had ever seen or guessed all the best equipment ever had, were packed into the space where there seemed to be nothing.

Because this Hubble Deep Field experience was one of the most devastating things in human science history, JWST took it as soon as it went up with a straightforward decision. Look at the image distorted by the gravitational lens that blatantly reveals its own weight!

On the other hand, point light source celestial bodies that are not recognized as cotton beyond the telescope's resolution, such as stars and the remaining galactic nuclei, leave shiny diffraction spines. Although these spines look pretty like stars, they are actually pleasing to the eye. For example, in the famous "pale blue dot" photo, the blue dot is on a band of faint light, which is actually part of the diffraction spines of sunlight. Without it, we would have been able to see a really lonely blue dot left alone in the black universe, but unfortunately, due to the limitation of the inner planet, we had no choice but to see it eaten by the sun.

Because this diffraction thorn is caused by light diffracted through a telescope's support or pinhole, we can also guess what the shape of this diffraction thorn is like by Fourier transforming it into a JWST support shape.

The only regrettable thing is that we will never be able to travel anywhere in the galaxy far away in our lifetime, which was obtained by photographing the dark air of the night like that. The distance between the nearest star, whose mass is not that different from the sun, and the closest galaxy similar to our galaxy varies by a million times. Even if we created a mechanical body and developed a warp drive that moves hundreds of times the speed of light, we would not be able to reach the closest galaxy.

The galaxies in the deep field picture are billions of light years away. We will never know the stars, planets, and aliens inside the galaxy, because it is a place like Andromeda, whose diameter is several times larger than the sun, is incomparable. Even if a miraculous intergalactic navigation method is discovered and we can somehow really go through the walls of time and space, the galaxy that has been there will not be the galaxy from the time we saw it as a space telescope.

Here we think once again of Olbers' paradox.

"Why is the night dark?"

Now we know that the answer to this problem is, 'The observable universe has a finite size, so the stars are not evenly spread out to infinite distances, so there is a gap somewhere, and light from distant galaxies is redshifted by spatial expansion, so it is not detected by our eyes.'

It was Edwin Hubble who allowed me to answer that the night is dark because the universe is expanding.

A space telescope named after the Hubble reversed that conclusion and soothed Olbers in the grave, saying he was still half right.

Wherever we thought was a dark, empty night sky, there were countless galaxies outside billions of light years, so the night was not that completely dark. The question you asked was unfathomable.

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