In the vastness of space, there is a man-made probe that has been marching silently for 45 years. It is Voyager 1.
Since its launch in 1977, it has traveled about 23.5 billion kilometers, making it the farthest space probe ever flown. It was reported to have flown beyond our own solar system, but was later denied to have passed through the solar wind top.
Only continue to leap the parcel after the oort cloud in the outer reaches of the solar system, in order to be truly fly out of the solar system, scientists estimate the oort cloud radius reached a light-year, and voyager a speed of only 17 kilometers per second, even if does not consider the future of the sun's gravity slows, voyager a minimum for another 19000 years to fly out of the solar system 39bet-kết quả bóng đá-kết quả xổ số miền bắc-kèo bóng đá -soi cầu bóng đá-đặt cược.
You may feel the vastness of the solar system and the smallness of human beings, but in the vast universe, the solar system is also a small existence.
The entire Milky Way galaxy has a radius of 100,000 light-years and contains nearly 400 billion stars, of which the sun is just an ordinary one, and the solar system is just an ordinary galaxy on the third cantilever of the Milky Way. The Milky Way is to the solar system, just like the solar system is to the Earth, only magnified in equal proportions.
Like planets, the solar system orbits the center of the Milky Way galaxy every 250 million years.
From the Earth to the solar system, from the solar system to the Milky Way, it seems that every different structure has a higher parent. The Milky Way, so the logic goes, would also have a "superior".
We can look at nebulae and galaxies hundreds of millions of light years away in images from the Hubble Space Telescope, and they look beautiful, like a frozen picture, but the laws of gravity are so pervasive in the universe that they actually move.
Although different galaxies may be millions of light-years apart, their massive masses and volumes can still be gravitationally entangled. If they happen to collide, they will pass through each other, and even if they don't, they may change their shape.
The Earth orbits the solar system in a year, the solar system orbits the Milky Way in a period of 250 million years, and the larger galaxies move over even longer and more bizarre time horizons. Galaxies are the basic celestial systems in the universe, and these galaxies continue to form clusters of galaxies and even clusters of galaxies.
Moving out of the Milky Way and further into space, we will reach the Local Group of Galaxies, which consists of dozens of galaxies, including the Milky Way, Andromeda and Trigram, forming a massive structure spanning about 10 million years. The largest of these galaxies is Andromeda, followed by the Milky Way.
Is this the end?
In the macroscopic view, the local group of galaxies is the parent of a larger cosmic structure: the Virgo cluster. It includes at least 100 clusters of galaxies, including the Virgo cluster and the Local Group of Galaxies, and is directly 110 million light-years old, making the Local Group of galaxies, where the Milky Way is located, a bit tiny.
The Virgo cluster is conservatively estimated to contain more than 2,000 galaxies, and every bright spot we see here is a galaxy as massive as the Milky Way.
In the past for a long time, scientists have long believed that the virgo cluster is the galaxy's biggest structure, because even if from the perspective of the observable universe, virgo cluster span is also considerable, until around 2014, American astronomer, Brent Bully, and French astronomer Helen Kurt tuva, finding that the Virgo cluster was part of a much larger structure, they discovered the Rania Kaia supercluster.
Ranikaia sounds like a big deal, but the Hawaiian word for "vast" fits this larger cosmic structure. The Lanikaia supercluster spans 520 million light years and contains nearly 500 clusters of more than 100, 000 galaxies.
If we were standing somewhere in the universe and we could take a picture of the Ranja Kaia supercluster, the Milky Way would be just a pixel in that picture. If the Milky Way were the size of a village, Ranja Kaia would be almost the same size as the continents of Asia, Africa and Europe combined.
But the shape of the Ranacaia supercluster is not regular. Instead of being rod-shaped or elliptical like a regular galaxy, or scattered like a cluster of galaxies, it looks more like a leaf, with countless capillaries scattered from the middle, on which the galaxy is shining.
In fact, there are many large-scale structures in the universe beyond the Ranja Kea supercluster, and some even exceed it, such as the cosmic large-scale filamentous structure known as the Sloan Wall.
It is made up of clusters of galaxies that span 1.37 billion light-years across the universe. In addition to marveling at the size of these macroscopic structures, scientists have also assumed the presence of dark matter when studying how they were born and maintained.
Because if gravity alone existed, these massive structures would have fallen apart in motion, scientists think there might be invisible dark matter all around us, forming the skeleton of these cosmic large-scale structures.