Why do we say that our universe has actually been visited by NASA?

Someone pointed out that these pictures were all made by NASAPS!

The news immediately exploded on the Internet, and people who didn't know the truth accused NASA of fraud and criticized it. Some conspiracy theorists even say that NASA's motivation is to find life in outer space.

But hey hey, I want to say, I don't know if NASA has found alien life, but NASA is really a top expert in PS. And PS is not equal to fraud, please don't use ignorance to guess our universe.

Now it's time to draw the key points and knock on the blackboard.

There are two kinds of astronomical photos of the universe that we often see: one is true color photos, and the other is false color photos.

The first category: true color photos. Because the colors of some nebula photos are real, they are taken with instruments in visible light band, and can be simply processed later.

The second category: false color photos. The strongest light emitted by most nebula galaxies is not visible light, so these nebula photos are taken in various invisible bands such as infrared band, ultraviolet band and X-ray. However, the original picture of false color photos is only divided into light and dark from the visual perception of people.

So astronomers render the oxygen, hydrogen and sulfur in the nebula gas according to the three primary colors of red, blue and green, so that we can understand the universe through clear color photos.

Just like the picture below-classic space photography, the name is particularly domineering, the English name is pillar creation, and the Chinese name is the pillar of creation or the pillar of all beings.

Under the premise of following very strict specifications, the staff used PS to go through a series of complicated operations before they got the works we saw today.

Simply put, many photos taken by astronomical telescopes are monochrome, and some of them are not photos, just some basic data.

Although these photos and data contain a wealth of information, they are completely incomprehensible to most people. So NASA used PS and other technologies to visualize these raw data, and then there were so many amazing astronomical photos. As ordinary people, we can appreciate the beauty of the universe.