Earth, this blue planet, is rotating around the sun at an astonishing speed.
Yet, we don't feel any of this, which is eerily strange.
At the same time, the sun is dragging Earth and other planets along at a speed of 630 kilometers per second through space.
However, we are equally unable to perceive this movement. Who are these planets anyway?
What lies ahead that is attracting our solar system?
Let's imagine, you're sitting in a car traveling at 90 kilometers per hour with your eyes closed. It's speeding along a wide, flat highway.
Inside the car, you hardly feel any motion because everything within the vehicle, including you, is moving at the same speed, as if synchronized.
Now, let's widen our perspective.
This highway is actually a part of a massive truck, and this truck is moving at 80 kilometers per hour.
The road extends with the truck's movement, and the truck itself is traveling on a broader path.
Adding the vehicle speed (90 kilometers per hour) to the truck's speed (80 kilometers per hour), we get a total speed of 170 kilometers per hour.
Yet strangely, you still don't feel this speed.
However, the reality is far more complex than this.
Because the road the truck travels on is actually part of a vast "convoy" of galaxies in the universe.
This "super convoy" is moving forward at an astonishing speed of 130 kilometers per hour, similar to the expansion speed of the universe.
At this point, the speed has reached 300 kilometers per hour, yet even amidst such intricate motion, you still don't feel anything unusual.
Because everything around you, including the car, the road, and the galaxies in the universe, the "super convoy," are all moving together at the same speed and direction.
So, what we perceive is usually just a small part of the space and objects around us.
Science tells us that Earth is rotating and orbiting, the solar system is moving within the Milky Way, and the Milky Way itself is also moving in the universe, which is continuously expanding.
All these movements are on a massive scale, beyond the range of our everyday perception.
The universe is so vast, and its diversity is astonishing.
It is estimated that there are at least a hundred billion galaxies in the universe, each containing billions of stars.
If we liken each galaxy to a grain of sand, then the total number of grains of sand in the entire universe would exceed the sum of all beaches on Earth.
In this vast universe, the diversity of celestial bodies is breathtaking.
Our neighboring planets like Venus and Mars, and gas giants like Jupiter and Saturn, all exhibit different characteristics.
But compared to these galactic worlds, the Great Attractor appears unique and mysterious.
The Great Attractor is like a giant with super-strong gravity, capable of controlling numerous superclusters of galaxies.
The scale of the Great Attractor is so immense that it's hard to imagine. It spans space regions hundreds of millions of light-years wide, containing vast superclusters of galaxies, and perhaps even unseen structures that we currently cannot comprehend.
For years, scientists have been trying to unravel the mysteries of the Great Attractor.
Some speculate it could be an exceptionally large celestial body, while others suggest it could be composed of many supermassive black holes surrounded by dark energy.
Whatever the truth about the Great Attractor, it is an extremely significant presence in the universe.
Its gravitational pull influences the galaxy we reside in, shaping the trajectories of neighboring superclusters and galaxy clusters.
If we can understand the nature of this mysterious gravity, then we can better comprehend the structure and evolution of the universe.
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