Lead
The most famous photograph of Earth is the 0.12-pixel dot photograph taken by Voyager 1 at a distance of more than 6 billion kilometers from Earth.
This photo makes us deeply realize how tiny the earth is in the universe, or that the universe is too vast, and the existence of human beings is really small and pitiful.
This image awakens people's thinking about the tininess of the Earth, and Voyager 1 began to continue to fly into the universe and leave the solar system after taking this photo.
People are deeply curious about this photograph and make people think about the possibility of other Earths in the universe.
And the space data shows that Voyager 1 has traveled 23.29 billion kilometers, so where will it go next?
What kind of exotic civilization will exist?
Will there be other Earths?
What kind of adventure will this be?
1. 23.29 billion kilometers have been traveled.
After all these years of flying, Voyager 1 has traveled 23.29 billion kilometers and is getting farther and farther away from Earth until August 25, 2012, when Voyager 1 left the outermost layer of the solar system and went to the edge of the solar system, and then to interstellar space.
And with about 3.6 trillion kilometers from the edge of the solar system, how long will it take for Voyager 1 to actually leave the solar system and enter interstellar space?
According to NASA's demographics and inferences, Voyager 1 will actually fly out of the solar system and into interstellar space in the next year or two.
This will be the first time that human beings have explored interstellar space, and it is also the world's first spacecraft to enter interstellar space, which is a great undertaking, and Voyager 1 has proved to the world that human science and technology are powerful, and also took the first step for human beings to explore interstellar space.
The flight of Voyager 1 is also a perseverance to complete the latest flight mission, and then it will continue to fly until the last drop of fuel is burned and continue to the depths of the universe.
So where will Voyager 1 go?
After all, the vastness of the universe and the innumerable number of star systems, galaxies, etc., so even if Voyager 1 reaches the end of its flight, it will continue to fly until it stops working.
Although the universe is vast, the veins in the universe are orderly, and there are different sizes of structures in the universe, such as the Milky Way, stars, and galaxy clusters, and there are also hierarchical connections between them.
The Milky Way is about 100,000 light-years in diameter, and there are more than 10 billion stars in the Milky Way, and the solar system in the Milky Way is also a part of it.
Earth is the third planet in the solar system, about 150 million kilometers away from the sun, and the solar system revolves around the Milky Way, which also has countless galaxies, stars, star clusters, and so on.
The existence of the universe is a huge cosmic group for human beings, and human beings are only one of them, and the existence of human beings is insignificant.
So what interesting things can humans discover as Voyager 1 continues to fly?
2. The history of Voyager 1.
If we talk about Voyager 1, we have to go back to 1977, when NASA launched Voyager 1 and Voyager 2 into space.
The purpose of these two spacecraft is to explore outer space and find the existence of outer space.
Voyager 1 was launched on August 20, 1977, and Voyager 2 was launched on September 5, 1977.
So what photos did Voyager 1 take during its journey to outer space?
The first is a picture of Jupiter, which was taken on March 1, 1979, about 58 million kilometers from Earth, and was the first human visit to Jupiter.
Next are the pictures of Saturn, which were taken on November 12, 1980, when Voyager 1 was taken about 160 million kilometers away from Saturn, and on August 25, 1989, Voyager 1 took pictures of Neptune, about 490 million kilometers away.
Voyager 1 took pictures of these four outer planets, which also provided important data for human exploration of outer space, as well as human exploration of outer space.
From Jupiter to Neptune, this is Voyager 1's first and only exploration of outer space, after which Voyager 1 will continue its flight to interstellar space.
But in the process of exploring outer space, Voyager 1 also took pictures of all the planets in the solar system, including Earth, so when were the pictures of Earth taken?
While Voyager 1 was exploring outer space, it also took pictures of all the planets in the solar system, and the picture of Earth was taken on February 14, 1990.
At that time, Voyager 1 was about 6 billion kilometers away from Earth, and the photo taken was only 0.12 pixels in size, so in the photo, the Earth was just a small white dot.
3. The last photograph sent back by Voyager 1.
On February 14, 1990, Voyager 1 took a 0.12-pixel image of the Earth more than 6 billion kilometers away, so what is the significance of this photo?
Because this photo makes people realize how tiny the earth is in the universe, or the universe is too vast, and human exploration of the universe has only just begun, and the existence of human beings is even more small and pitiful.
But on August 25, 2012, Voyager 1 left the outermost layer of the solar system, headed for the edge of the solar system, and then went to interstellar space, which means that Voyager 1 will actually fly out of the solar system and into interstellar space in the next year or two.
So if you want to talk about the photo of Voyager 1, then this photo is the last photo it sent back, because Voyager 1 will actually fly into interstellar space in the next year or two, and it will continue to fly until the last drop of fuel is burned, and then it will continue to go to the depths of the universe.
4. Why does this photo make people think deeply?
So why does this photo make people think deeply?
Because more than 6 billion kilometers away from the earth, the 0.12 pixel size of the earth photo taken by Voyager 1 has made human beings feel the insignificance of the earth in the universe, or the universe is too vast, and the existence of human beings seems insignificant.
So what would happen if one day, human beings really discovered other earths in the process of exploring the universe?
No one knows where human exploration ends, and human hearts are full of curiosity about the unknown.
So how vast is the universe?
There are countless planets in the Milky Way in the universe, and including the sun, they are all stars in the Milky Way, and the Milky Way is not the only star system in the universe, there are many star systems in the universe, it can be said that there are countless stars in the universe.
And the Milky Way galaxy also has stars of different brightness, there are different star clusters between these stars, there are galaxies between these star clusters, and so on.
The universe is in order, and these laws are interconnected, and the Big Bang hypothesis, which is a basic assumption in cosmology, is the basis of cosmology.
According to the Big Bang theory, within 1 billionth of a second of the birth of the universe, the universe expanded to a quadrillion-fold of its current size, and after the Big Bang, the universe continued to expand to this day.
The expansion rate of the universe can be estimated through the observation of cosmic microwave background radiation, and there are many observational data, which also prove that the universe is in a state of accelerated expansion.
epilogue
Human exploration of the universe has only just begun, and perhaps one day in the future, human beings will really discover other earths in the universe and discover that there is life on other earths.