The flying machine flew lonely in the vast universe, and Bai Tang became bored from the initial excitement. She yawned and asked Kate, "How long do you have to fly?" ”

"It's early!" Kate moved her gaze from the virtual screen to Bai Tang's body, "We haven't flown out of the solar system yet. Waiting out of the solar system to reach the first space jump point, we need to go through three space jumps before we can reach the edge planet of the Alliance, Gate. ”

"it!" Bai Tang directly squirreled and slurified. Doesn't it say that the future of science and technology will be highly developed? Why is the speed of the aircraft still so low? Isn't it supposed to be an acceleration to fly out of the solar system?

"I want to let the wind go!" Bai Tang retracted into the chair sadly, and the driver's seat was designed according to the ergonomics, and it was very comfortable to sit on. Her gaze swept over the inside of the craft and her mouth flattened. Because it is a one-man flying machine, the internal space is very narrow, except for two seats, the other space is only twenty square meters in size, most of which are stuffed with the earth's "specialties" - several vegetables and fruits transplanted to the earth from the space, Kate packed all of them into the aircraft, some of them were used as food along the way, and the rest were handed over to the research center after returning to the alliance. Kate told Bai Tang that the research center would reward a large amount of money to the discoverer of a new species of edible plants, and he would not want any of this bonus, but all of it.

"Wait, in half an hour the craft will pass by the planet Pluto, where we can rest less." Kate comforts Bai Tang.

"Planet Pluto?" Bai Tang thought for a moment, "Pluto? ”

"Pluto? That's a good name! Kate exclaimed, "This planet is covered with a thick layer of ice, which is quite similar to the legendary underworld. ”

"Pluto is actually the name of the Hades in ancient Roman mythology on the ancient earth, he is the lord of the underworld, the king of the underworld, and the ruler of the spirit world after death. In addition to Pluto, the solar system also has Uranus and Neptune, and the nine planets of the solar system are named after the gods of the ancient earth: for example, Uranus is also known as Uranos, who is the god of the sky in Greek mythology; Neptune, also known as Neptune, the god of the sea in Roman mythology; Venus is named after Venus, the goddess of love in Roman mythology; The earth, also known as Earls, is both the name of the goddess of dawn and the name of the original god of ancient Greece......"

"You know a lot about the Earth?" Kate said casually.

Bai Tang smiled: "These are all heard from Xiao C." ”

Fortunately, he has an old antique from the earth as a shield, Bai Tang squinted his eyes, and looked at the small machine with satisfaction, squeezing watermelon juice on the side. It is worthy of the most advanced household machine qì people three thousand years ago, and many programs for cooking and making pastries and juices were entered into the motherboard of Xiao C, and Bai Tang was too lazy to do it during this time, and they ate all the food made by Xiao C. This led Kate to covet Little C and offered to buy Little C at a high price. Bai Tang naturally didn't agree, Kate grinded and grinded every day, Bai Tang was bored, and promised to wait until he returned to Blue Star to let Xiao C transmit some of the recipes to Kate's personal butler machine, which got rid of Kate's entanglement. Don't look at Kate's appearance as a handsome guy with cool and serious clothes, it's all coaxing outsiders, and after getting acquainted with him, you will know that this person is a scoundrel.

When Xiao C heard Bai Tang mention its name, the two bulbs narrowed into "^^", put two cups of watermelon juice on the tray, and broke off.

"Thank you, Little C!" Bai Tang picked up a drink, and touched the head of the small machine with his other hand. Little C is even happier.

Kate took another glass of watermelon juice and took a sip, and said to Bai Tang: "I now think that the appearance of the person is not important, the important thing is the inside!" ”

Bai Tang replied with "hehe", she had seen the photo of Kate's housekeeper machine, which was a big beauty with a fiery body.

Half an hour later, the spacecraft landed on Pluto, and Bai Tang walked out of the spacecraft wearing a special spacesuit given to him by Kate. The future cosmic suit is not as bloated as the cosmic suit of the 21st century, the future cosmic suit is close to the body and comfortable, not to mention the convenience of movement, but also heat-proof, cold-proof and anti-radiation, producing oxygen for people to breathe, which is extremely convenient.

"It's more desolate than Earth!" Kate scanned the environment of the planet and said to Bai Tang, "Let's rest for an hour and leave in an hour." ”

Bai Tang nodded and walked on the ice, she remembered a comic book she had read before, "Galaxy Railway 999", and the terminal was Pluto. At that time, Pluto was also known as one of the nine planets in the solar system. It was 2006, and Pluto was expelled from the Nine planets.

"Pluto is so small, how can it be called one of the nine planets in the solar system?" After walking around, Kate returned to Bai Tang's side with a question mark on her face and asked.

"This is related to the backwardness of the astronomical technology of the ancient earthlings." Bai Tang beckoned and summoned Little C to his side, "Popularize the history of Pluto to Mr. Kate." ”

"Yes, master!" Little C excitedly accepted the task assigned by his master, slipped to Kate, and began to memorize the information: "Pluto was discovered on February 18, 1930 by Clyde Tombaugh based on the calculations of the American astronomer Lowell, with an average distance of 5.9 billion kilometers from the sun, an orbital period of about 248 years, and a rotation period of 6.387 days. The surface temperature is below -220°C, and there may be a layer of solid methane ice on the surface. Due to its distance, at the beginning of its discovery, almost nothing was known about Pluto. Even in the largest astronomical telescopes, it is only a point of light, so it miscalculated the mass of Pluto, thinking that Pluto was larger than the Earth, so it was named a large planet. ”

After nearly three decades of further observations, scientists have discovered that Pluto is only 2,300 kilometers in diameter, which is smaller than the Moon. In 1978, American astronomers discovered that Pluto has moons. This discovery gives scientists reason to believe that Pluto's actual size is much smaller than originally estimated, and that it is even smaller than the Moon. Because of its small mass, Pluto does not attract its moons to orbit Pluto itself, but rather Pluto and its moons orbit around a common point in between. It's just that 'Pluto is a big planet' has long been written into textbooks, and the ancient earthlings will be wrong. ”

In 2006, the International Astronomical Union established a new definition of a planet: a planet must first be a celestial body, which satisfies the definition of one orbiting the sun, the second definition of having a mass large enough to overcome solid stresses to achieve a hydrostatic equilibrium (nearly spherical) shape, and the definition of three emptying other celestial bodies in its orbit. According to the new definition of planets, Pluto does not meet definition two, i.e., its mass is not large enough; And it doesn't fit definition three, because Pluto's orbit crosses Neptune's orbit, and if Pluto is considered a planet, then Neptune can't be a planet. So the International Astronomical Union decided to classify Pluto as a dwarf planet and downgrade it from the big planets......"

Kate sighed to Bai Tang: "When you come to Blue Star, you have to keep Little C in jail, the knowledge it has is a treasure trove for Blue Star, and historians will definitely rob Little C from you." ”

Bai Tang: "As long as you don't tell Xiao C about it, no one will rob me." ”

"No, I can't. The knowledge that Little C has is very useful for understanding the ancient earth, and it belongs to the all-blue star. ”

Bai Tang grimaced: "I can ask Xiao C to copy a copy of the information to you, you can say that it was found on the ancient earth." ”

"......" Kate hesitated for a long time, "This ......"

"If you don't agree, I won't let Xiao C give you the recipe to the housekeeper!" Bai Tang faintly threatened.

"I will never divulge Little C's deposit!" Kate immediately assured that after eating the food made by Little C, Kate no longer wanted to eat nutrients and nutritious food.

Bai Tang squinted his eyes with satisfaction and said to Little C: "Little C, I will eat fried French fries and shredded sweet potatoes for dinner today!" ”

Kate's saliva was dripping down: "Is there ketchup?" Fried fries are best with tomato sauce! Ah, what is a sweet potato? Is it delicious? ”

"When Little C is ready, don't you know if it's delicious or not?" Bai Tang returned to the aircraft with a smile, and Kate hurriedly followed.

The craft took off and flew out of Pluto in an instant, passing by Pluto's moons. Pluto's moons are one circle smaller than the main star, and they orbit the same common point as the main star.

"Pluto's moon also has a name, called Charon, the boatman of Hades, the king of Hades in Greek mythology, who was responsible for crossing the dead across the River Styx." Bai Tang looked at the satellite and said.

"Charon?" Kate asked curiously.

"It's not Charon, it's Charon. Don't get confused. ”

"Why? I don't think there's much difference! Kate felt that there was only a slight difference between the two pronunciations, so why bother to distinguish so carefully.

"The big difference is that Charon and Charon are both characters from Greek mythology." Bai Tang despised Kate's ignorance, "Kajon is a Kentaurus, that is, a centaur, he is known for his kindness and wisdom, piano, chess, calligraphy and painting, bows, arrows, knives and guns, boxing and sumo, heaven and earth, he is almost omnipotent, omniscient. He lived in seclusion in the cave of Piliwen and taught the art of martial arts. Any student of his, even if he has only learned one skill, can dominate the world. The legendary Athenian king Theseus, the demigod hero of the Trojan War, Achilles, the first warrior of the Greek coalition, Hercules in ancient Greek and Roman mythology, and even almost all the heroes in ancient Greek mythology came from his disciples. Charon is arguably the ancestor of Greek heroes, and his disciples are collectively referred to as 'Heroes of Pilivin'. ”

"Charon is the son of the god of the river Styx, the dark god of the five creation gods, Erebos, and the goddess of the night, Nyx. He was Hades, the Hades king, a loyal subordinate of Pluto. The moon of the planet Pluto is naturally Charon, not Charon! ”R1152