Where is "north" in deep space? Where are we on the map of the universe?

How do you define "north" and "deep space"?

Here's the best way to define it that I've ever known: using the "right-hand rule." Make your right hand into a fist with your thumb pointing up. If the direction of the planet's movement matches the direction of the curvature of your finger, your thumb will point to the North Pole. That is, "North Pole" is a way of defining the movement of the planet. If everything did not rotate, there would be no North Pole.

Because the Earth rotates, we can define a North Pole (each different celestial body has a different North Pole). If you and the Earth are close together in space, then you can share the same direction of north, which makes at least a little sense.

The solar system is also rotating, so we can also define a north pole (which is not the same north as we know, it is tilted about 24°) - so any star close to the solar system can use this north pole.

The Milky Way is also rotating, so on the scale of the Milky Way we have the definition of a third North Pole.

So can we go further? Some of the galaxy clusters we know of rotate (perhaps a quarter, although the true ratio is certainly higher), so you can also define the north pole within their region.

But apart from the above, everything else is different, and talking about the Arctic becomes meaningless. Out over 250 million light-years of space, the universe is uniform and non-rotating to the greatest extent that we can resolve. This sounds very far away (like 100 times further away than the Andromeda Galaxy). But from a larger perspective, it is tiny. Millions of such systems make up the visible universe.

So if you need a map of the entire visible universe, I'm afraid you have to admit that the direction you determine is completely arbitrary. There is no such thing as a "right direction". Only when you zoom into an area one millionth the size or smaller can you make a very "natural" choice to create a map. Relevant knowledge

The universe is a unity composed of all time, space and its contents; it includes planets, stars, galaxies, intergalactic space, subatomic particles and all matter and energy. It refers to space, and universe refers to time. The distance of the universe currently observable by humans is approximately 93 × 10? light-years, with a maximum distance of 27,160 million parsecs. The size of the entire universe may be infinite, but there is no conclusion yet.