Sky map is made from Planck satellite.It is clear that a large area of unusually low temperature is known as the "Cold Zone".
If our Universe has "bulged" from the vacuum after the Big Bang, scientists believe that by the same way billions of other universes can also be born, creating space-time systems. different from us.
Tom Shanks, a professor at Durham University's Astronomy Center, said: "The Cold Zone may be the remaining sign of a collision between the universe and our universe. "cosmic standard", Cold Zone is quite close to us, 3 billion light-years from Earth. "
After the Big Bang, the entire universe is surrounded by the Cosmic Microwave Background (CMB) and can be detected by a telescope from Earth.
Scientists have discovered, while the temperature of most CMBs is about 2.73 degrees above absolute zero (or -270.43 degrees Celsius), the Cold Zone has a temperature of about 0.00016 degrees lower. compared to the neighborhood it.
At first, scientists thought that the unusual coldness in this place could be purely due to a hoax of light. They speculate that the Cold Zone is actually a "super vacuum" that possesses less than 10,000 galaxies compared to normal and so barren that it drains energy from the passing light, moving most wavelengths turn red in the light spectrum. This will cause mistaken telescopes to be low temperatures.
In the figure, the 3D foreground distribution of galaxies in other regions (red dots) and the 3D foreground distribution of cold-galaxy galaxies (black dots) have the number and size of galactic density regions. Low in both is the same.This makes the resolution of the Cold Zone's existence due to the vacuum, unstable.
The Durham University team is aware of a small group of vacuums that do not exist in the Cold Zone, but their numbers are too few to explain the existence of the Cold Zone.
According to Professor Shanks, there must be another explanation for the existence of the Cold Zone and perhaps the most interesting explanation is that a collision between our universe and another cosmic shadow has created the Cold Zone. .