Beibei roams the magical starry world

The setting sun gradually dives below, and the peaks of the Abisen Canyon appear tall, majestic, and bright; a few white clouds in the sky are waiting quietly for the night to begin. The setting sun gradually merges with the sky and the earth, and a few "coo-coo" sounds are heard from deep in the ravine from time to time. With the cry of "Cuckoo", a few rays of light sneaked in, showing their beauty in the waves, and then merged into the sea of ​​stars in the night.

Qiuqiu slowly walked to the stone archway in Abisen Canyon. After looking at the three friends on his shoulders, he felt that they were too eye-catching.

So, Xiaoyan was put into the Dantian, Dumbo was put into the storage space by Yuanyuan, and Yuanyuan turned into a small hairpin stuck in Qiuqiu's beautiful hair.

Qiuqiu suddenly becomes a lonely little sister, which makes people feel the slightest pity when they see her.

After walking for more than an hour, Qiuqiu approached a small town near the Apenson Canyon. He planned to rest for a night and rent a speed car tomorrow to catch the spaceship back to Ampera.

Passing by a forest, three people walked out of it.

The man in the middle was wearing a hat, with a round face, a fat figure, and a pair of bloodshot eyes looking at Qiuqiu with hatred.

The person on the left has bulging chest muscles, a wolf head tattooed on his thick arm, and a long knife hanging on his waist, looking fierce.

The person on the right is Uncle Li, pointing at Qiuqiu and saying: "Master, it was her beast control that killed the young master."

A person on the left interrupted and said, "What nonsense are you talking to her about? Just do it!"

The master in the middle said: "You two come together and capture her for me."

The two of them rushed towards Qiuqiu from the left and the right, but Qiuqiu didn't move. In the eyes of the three people, they thought Qiuqiu was frightened.

Just as he was about to pounce in front of Qiuqiu, Qiuqiu dodged and dodged the attacks of the two men and said, "Are you being reasonable or not? Your people were attacked by a herd of beasts. Why are you looking for me?"

When the two of them saw that Qiuqiu had escaped their attack just now, their expressions became serious. Uncle Li said: "At such a young age, he is already a magician. He must have a good background!"

As he spoke, he glanced at the old man of the town, as if to say: "This person must have a background, don't kick the iron plate."

The eldest man's mind was filled with the anger of losing his youngest son. How could he think so much? He said bitterly: "Let's go together, no matter life or death."

Just as the three of them were preparing to attack Qiuqiu, a large black shadow appeared above their heads, covering the forest.

The ball in front of the three people disappeared, and a mothership was in front of them.

"What is this? A giant aircraft." The three people's minds went blank.

With a "boom", a laser shot out. Before the three of them could react, they disappeared between heaven and earth, and three void bags fell to the ground.

Yuanyuan put away the mothership and turned it into a hairpin stuck in Qiuqiu's hair. Qiuqiu put away the three void bags and turned around and left.

Along the way, Qiuqiu asked Yuanyuan to release the forty people imprisoned in the storage space. After warning them not to help the tyrants in the future, he let them leave.

When he arrived in town, Qiuqiu found a hotel to stay at, opened three void bags, and poured out the contents, including tens of millions of magic stones, several magician training books, several jade slips of martial arts, and dozens of items. Medium to high-grade magic weapons, a lot of ores, some medicinal materials, a brocade box opened to reveal a parchment with half a treasure map drawn on it.

"There are tens of millions of magic stones. What a corrupt official. He died unjustly." Qiuqiu thought.

"You can choose what you need. Yuanyuan can store the rest in your storage space!" Qiuqiu said.

The friends looked at it and shook their heads. Xiaoyan said, "Leave it for now! You will need it later."

Yuanyuan put away a lot of things, and Qiuqiu, Yuanyuan, Dumbo, and Xiaoyan entered the cultivation state one after another.

Early the next morning, Qiuqiu rented a speed car and drove to catch the spaceship.

After driving for a day, we arrived at the airship terminal and bought a spaceship ticket to "Ampera".

Get on the spaceship, find your room, and close the room. After setting up the soundproofing function, checking the room, and finding no risks such as eavesdropping or secret recording, Qiuqiu called out Xiaohuan.

"Xiao Huan, we are in the room of the spaceship now. No one will disturb us. You can start telling us about the 'space channel'." Qiuqiu said

"Then let me start talking." Xiao Huan said

Qiuqiu, Yuanyuan, Dumbo, and Homura all nodded.

"First let's talk about some basic knowledge, and then talk about time and space travel.

1. Basic knowledge

1. Black hole: The gravity is extremely strong, making the escape velocity within the event horizon greater than the speed of light. That is: a celestial body whose space-time curvature is so great that even light cannot escape from its event horizon. In other words: nothing, including light, can escape from a black hole.

2. Gray hole: A black hole radiates particles, so it is no longer suitable to be called a black hole, but should be changed to a "grey hole". In other words, a black hole radiates particles, so it is not true to say that nothing can escape. There is no black hole, only Gray hole.

3. White hole: It is an ejection source in the universe. It can provide matter and energy to external areas, but it cannot absorb any external matter and radiation.

4. Space folding: The shortest distance between two points. In the universe, the "0 distance" is caused by the direct approach of two points after space folding.

Think of the entire universe as a piece of foldable paper. This does not mean treating the universe as a flat surface. The universe is still a three-dimensional and multi-dimensional existence. It just means that the two points you want to verify are studied in one dimension and placed on a flat surface. becomes very simple.

It is mentioned in the general theory of relativity that space is considered to be a four-dimensional space-time, and space folding can be achieved by folding one region of the four-dimensional space-time with the adjacent part of another region.

5. Space hole: It is a narrow tunnel that may exist in the universe connecting two different time and spaces.

6. Wormhole: A theoretical physical phenomenon that is a space passage to other places or times. In other words, a space travel passage or a time travel passage.

The formation of a wormhole requires two extremely massive objects, such as black holes or stars, to meet or collide at a very close distance, thus forming gravitational waves.

Abnormal changes in gravity cause space-time to bend, forming a wormhole. Wormholes may also be space-time tunnels connecting black holes and white holes, so they are also called gray lanes.

7. Time stands still: When the speed reaches the speed of light, time tends to stand still. In other words, time tends to stand still at super-light speed, and time travel may even occur.

Another basis of relativity is that the speed of light is constant.

It is mentioned in classical physics that two trains with the same speed are traveling in opposite directions. If you stand on one train and observe the other train, the speed of the other train should be the sum of the speeds of the two trains.

But in relativity this is not the case! If you stand on one light and look at another light in the opposite direction, the speed of the other light is still the speed of light. It seems that the speed of light is already the limit of the universe! From the current theoretical basis, super-light speed is unachievable.

8. Reverse time axis: The plane is a two-dimensional world, the three-dimensional space is a three-dimensional world, and the world we are in has 3.5 dimensions because there is half a forward time axis!

From the perspective of dimensional completeness, time should have the other half of the coordinates, which is reverse time!

From this perspective, it seems that you can go back to the past by following the reverse timeline.

After Xiaohuan finished explaining the basic knowledge, he looked at everyone with a smile, waiting for everyone to slowly digest the knowledge just mentioned.