How do scientists know the overall picture of the universe? How could they see such a scale?

How do scientists know the overall picture of the universe? How could they see such a scale?

Michio Kaku: The Universe in a Nutshell (Full Presentation) | Big Think

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answers (2)

Answer 1
June, 2021

As I understand it, this is a large-scale structure of the universe?

It is worth noting that this image shows the distribution of matter (1 600 000 galaxies) in the Universe at the largest visible scales.

The structure was compiled over 4 years in 1997-2001 from images obtained with two telescopes in the northern hemisphere (Whipple Observatory, Arizona) and southern (Chile). The brightness of galaxies is shown in color from blue (brightest) to red (dimmest). The dark stripe along the diagonal and the edges of the picture is the location of the Milky Way, the dust of which interferes with observations.

As a result of the survey, more than 300 million objects were cataloged.

In addition There is also the Sloan Digital Sky Survey. The brightness of each point reflects the distribution density of galaxies in a given direction in successively changing sections of a constant thickness of 10 Mpc, so that the linear scale of the image increases with the transition to more distant layers - therefore, the size of the structures seems to decrease. The long lasting bright spot at the bottom of the painting is the Sloan Great Wall.

Answer 2
June, 2021

Actually, they have not seen the universe. This is just a guess, if not a global lie. There are many arguments to be made in favor of astronomy, but it honestly means little. Nothing in our heads will change if space suddenly becomes not a black abyss, but a red fiery abyss. Don't waste your brain on scientific "heresy".

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