Chen 'a photography

When we open a chapter about the earth in geography class, we will learn a lot about the earth, its size, mass, its rotation and rotation speed, its equatorial circumference and so on.

All these have established a huge planet in our cognition. From here on, we lament the smallness of human beings, but when we see the pictures taken by detectors tens of billions of kilometers away from us, the smallness of the earth hits our hearts directly.

The name of this detector is "Voyager 1", which was launched by the United States in the 1970s. Its purpose is to find out the distant interstellar space, go to the outer space of the solar system, and understand the space-time state there.

At the same time, in the process of crossing the whole solar system, we can get as much information about other planets as possible, and then launch another probe, Voyager 2.

Voyager exploration project is the record of mankind so far. They have the longest flight distance and the longest flight time. The working life of both detectors has exceeded 40 years, and Voyager 1 has traveled 22.98 billion kilometers, which is the farthest detector from the earth at present. As far as finishing one's own task is concerned, there is no need to go that far.

According to its feedback to the ground base, Voyager 1 completed all the work as early as 6.4 billion kilometers away from us, but in view of its good operation, scientists still let it go further into the depths of space.

Of course, as we all know, its final outcome is bound to be gone forever, or Voyager 1 was originally a retrospective journey without starting from the beginning, but it sent back information and data from distant space to the earth, which is of far-reaching significance to astronomical research. Even if it finally loses contact with us completely, its name will remain in human history forever.

In addition to completing its own set tasks, Voyager 1 also did some other meaningful work, such as taking a family photo of the solar system, which was the last photo it took.

Strictly speaking, this family portrait is synthetic, which was drawn by the navigator 1 after taking photos of the planets in the solar system separately and then putting them into a picture. However, because it was shot at the same time, it can be said that it is a family portrait, but there are also members missing. It is also a small pity that Mercury and Mars were not photographed because of the dark space background.

In the picture we see, its exact size is 0. 12 pixels, which is incredible. The huge blue planet depicted in geography textbooks suddenly became the size of a dust, and this visual contrast was too strong. Therefore, this dusty earth is named "dim blue spot", which is worthy of the name.

In fact, we all know the truth that the near big is far small, which is a very natural visual law, but perhaps it has refreshed human cognition and feeling of the small again, so it has caused such a strong impact on people. In fact, before this dim blue dot, there were many different pictures of the earth.

For example, Apollo 1 7, launched at the same time as Voyager1,also took a picture of the earth on the way to the moon. The astronaut pressed the shutter while the spaceship was still rising, so the image of this picture is very clear. The blue and white planet is like an island in the universe, and it looks full of vitality.

However, it seems a bit lonely in the background of the whole space. This photo, named "Blue Marbles", has become a very classic photo of the earth.

Earlier, a photo of the earth was taken at a farther distance. This photo came from another spaceship named apollo 8, which was also the masterpiece of the astronauts on the spaceship. This photo is different from dim blue dots and blue marbles. This is a failure. At that time, because of the orientation, only the northern hemisphere could be captured, so it looked like the earth was playing hide-and-seek with astronauts, and only half of its body was exposed.

But in the dark space background, this scene has a special flavor, as if a semicircle of bright blue sun was born, and it seems that it will be completely seen in the next second, with a generate vitality. The name of this photo is also very appropriate, called Sunrise.

For us who live on the earth, the appearance of the sun means vitality, and in the dead space, the earth with thousands of lives is a symbol of vitality and vitality.

At a certain moment, the earth is huge, it carries and breeds countless lives, and at a certain moment, it will become small, as small as a dust in the universe, making us feel our own smallness.

Whether it is blue marbles, sunrises or dim blue spots, they are all the earth, and they are all different dimensions of the earth, which also makes us think more deeply about life and existence.