Does the universe have boundaries?

From the data, people have observed 13.7 billion light years away from our farthest galaxy.To put it simply, the area of the universe where the data is recorded is centered around the earth, with a radius of 13.7 billion light years, which is the universe we know today.This is have authority on the basis of the information, but the earth is not the center of the universe, has 137 light years away is not the boundary of the universe, just scientists' observation ability, so we can be aware that the degree to the universe.
Does the universe have boundaries?Is the universe finite or infinite?There are countless theories in the ancient and modern times, not only the ordinary ones we are discussing, but also the famous astronomers are disputing about it.
Around A.D. 140, the famous ancient Greek astronomer Ptolemy proposed the earth center.In 1543, the polish astronomer Copernicus, after more than 40 years of painstaking research, put forward the idea that the sun is the center of the universe.They are limited in the universe to a very small extent, and mistakenly believe that the solar system is the universe.Similarly, ancient Chinese astronomers had long believed that the universe was infinite.In the book of the corpse, the corpse of the corpse said: "heaven and earth, the ancient world, the universe."The vague representation of the universe in space is infinite in time.Liu zongyuan, a famous philosopher in the tang dynasty, said in "the sky is right" that the universe "has no center and no side", that is, no center has no boundary.
The Italian philosopher Bruno has published "on the infinite universe and the world", and put forward the infinite theory of the universe.
This is the history of the universe. Does the universe have boundaries?
Hawking thinks the universe is finite and unbounded.On earth, for example, no matter from the South Pole to the North Pole, or from the arctic to the Antarctic, all can not find the boundary of the earth, but also can't so that the earth is infinite, the fact is that the earth is limited.The same is true of the earth and the universe.