Flying 22.5 billion kilometers, the last photo taken by navigator 1, why is it thought-provoking?

In order to further explore the universe, humans have launched a large number of detectors into space. So far, the farthest detector from our earth is Voyager 1, which is more than 22.5 billion kilometers away from the earth.

Many people are curious about this. Voyager 1 has sent back countless wonderful photos to the earth during its 43-year flight and made many contributions. Why is the last photo thought-provoking?

The farthest probe voyager 1 Yu1September 5, 977 was launched by Titan III E Centauri rocket at Cape Canaveral base in Florida, USA, and began a long journey of space exploration.

At the beginning, Voyager 1 aimed to detect four gas giant planets (Jupiter, Saturn, Uranus and Neptune) and their satellites, and Voyager 1 also completed the basic detection tasks as scheduled, for example,1started to detect Jupiter in 979, and found the Great Red Spot on Jupiter during the detection process;

1980, Voyager 1 arrived in Saturn and sent back tens of thousands of color photos to the earth, including the beautiful optical ring system of the gas giant planet Saturn; 1990, the navigator 1 took a "family photo" of the solar system on February 14. ...

After 43 years of long-distance flight, Voyager 1 is now more than 22.5 billion kilometers away from the earth, which is equivalent to 150 times the distance from the earth to the sun. Because it is too far away from the earth, it takes about 2 1 hour for the signal sent by Voyager 1 to be received by Voyager1,which is the farthest detector in human history.

The last photo-family photo of the solar system 1 February 4, 990, Voyager1completed the basic exploration task, 6.4 billion kilometers away from the earth. In order to save energy, NASA will shut down some equipment of Voyager 1, including cameras.

Before turning off the camera, NASA sent an order to Voyager 1 to turn around and take the last photo towards the solar system. It took nearly 6 hours to send this photo back to Earth.

In fact, from the camera's point of view, this photo is black and unqualified at all, but it is of great significance to human beings, and it is this photo that makes us lost in thought.

If you don't look at the photos carefully, it is dark and it is difficult to find the location of the earth. But if you zoom in and look closely, you will find a tiny blue dot in the photo, so this photo is also called "dark blue dot".

In the photo, that blue dot is the earth where we human beings live. In fact, in this 640,000-pixel picture, the earth only accounts for 0. 12 pixels. It is conceivable how small our earth is, which makes scientists think deeply.

Dr Carl Sagan, an astronomer, was also inspired by this photo of the earth and wrote the book Dim Blue Dot, which made carl sagan famous.

The universe is much bigger than we thought. The observable diameter of many universes is 93 billion light years, and the universe is still expanding at superluminal speed, so the diameter of 93 billion light years may be just the tip of the iceberg in the vast universe.

We can learn about it in this way. First, our earth has a diameter of 1.33 million kilometers and a circumference of about 40,000 kilometers. The distance between the earth and the sun is about1.500 million kilometers.

Let's look at the solar system again. The solar system is a collection of celestial bodies centered on the sun and constrained by its gravity, including the sun, 8 planets, 205 satellites and at least 500,000 asteroids, as well as dwarf planets and a few comets. So the earth becomes insignificant in the solar system.

And the milky way. The Milky Way is the star system where the solar system is located. It is a galaxy group consisting of 1000 billion to 400 billion stars, clusters and nebulae, with a diameter of 80,000 light years. On the other hand, there are local galaxy groups and so on. Compared with the universe, these are nothing to mention, so it seems that the earth is still as small as dust.

In a word, human beings are indeed a tiny existence, but even so, we humans are still the most special existence in the universe at present.

However, there is a metal record on Voyager 1, which contains music, photos and greetings in 55 languages from different human cultures. It will continue to travel to the depths of the universe with evidence of human existence.