I am an amateur astronomer, and I just started. Which expert can help me explain whether the nebula map is true or not?

Try to answer your questions in paragraphs.

1, when you look at these pictures, first look at its introduction and get to know its shooting band. In the electromagnetic spectrum, photos of different bands must be processed in different ways to obtain the maximum information of astronomers. For example, in the infrared band, photos must be pseudo-colored, and different colors (colored after software processing) are used to represent different infrared wavelengths, and even a certain color is used to represent the element composition enrichment area that has been analyzed; So is the ultraviolet band. If the picture is marked as "visible light photo", its color is very close to the real color.

2. Observing the nebula with the naked eye (including observing it with a telescope or even taking a spaceship) will almost certainly not be as rich as photos, because astronomical photos are obtained after a long exposure, even after a long exposure in a color channel, so as to better show the details of the target nebula with extremely low contrast. This is a bit like the photographer's evaluation of digital SLR. This is strong, and that is Leng Yan. Photos of the same target show different styles, and often capture rich colors that are not easily perceived by human eyes. Of course, if we are really close to these nebulae, the effect visible to the naked eye is still a mystery, because humans have only been to the moon as far as possible, and the distance between these nebulae and the earth is often calculated in hundreds of thousands of light years.

3. The darkness of space will definitely be much darker than the night sky. Because our night sky is actually the color of the atmosphere, all kinds of light sources (including celestial bodies) will scatter inside and illuminate the night sky. In space, if your line of sight is not aimed at the luminous celestial body, then all you can see (receive) is the background radiation of 2.7K. This is equivalent to the brightness you can see when you are locked in a closed room made of graphite and then cooled to the temperature of liquid helium. There is no mystery and loneliness in this darkness, almost pure nothingness.