Clow Cards Cardcaptor - Chapter 1291
“In fact, it’s just exploration. Actually, it started when the first satellite was launched.”
A high-altitude island-like mountain top, surrounded by the bonfire under the magnificence of the Milky Way, heard Fang Ran’s question, Klim replied with a smile.
But I can guess that the “exploration of the universe” he said should be able to travel between stars, and he was a little embarrassed:
“But if you mean what you think, it is probably the expected future development in the next few centuries. The internal determination cannot be achieved, and the follow-up time cannot be predicted.”
When he heard his very rigorous answer, Fang Ran nodded and asked very simply and straightforwardly:
“Is it because I can’t build a spaceship?”
“Hahaha, that’s not the case. That’s right.”
Hearing this, he couldn’t help laughing. Klim raised his head and looked up at the prosperous starry sky above. Even though there have been several astronomical observations,
it’s the first time he saw such a clear and beautiful sight with his own eyes. Of the Milky Way.
“But in the final analysis, we know too little about the universe, too much unknown, leading to no theoretical knowledge before the creation of the universe,”
“And facing its huge, small and helpless.”
Speaking of this Klim lowered his head to look at Fang Ran and chuckled slightly, telling a little about the hugeness,
“In the theory of relativity, the speed of light is the limit of the speed of the universe, but the size of the Milky Way galaxy is measured in 100,000 light-years, and the local galaxy group it belongs to is hundreds of Ten thousand light years,”
“And above that there are the Virgo Supercluster, and the higher-level Rania Kea Supercluster, and other superclusters of the same level.”
At the same time, he looked at the bonfire in front of him and said that it was small. .
“But we don’t even have a theory that a vehicle can reach the speed of light, let alone the nearest star a few light years away
.” “It’s hard to even move in the solar system.”
And Fang Ran’s face was stunned. He just barely knew the Andromeda Galaxy. This was the first time he knew the name of the superior galaxy in the universe,
the scale of one hundred thousand or one million light-years, country, economy, earthquake, race, and culture. .. It seems that everything seems small when compared with the astronomical distance.
“Is it because no one has studied it?”
Every time I chat with Klim, Fang Ran will be troubled by his lack of knowledge and can’t ask any decent questions,
but maybe because of this, he likes to talk with Klim very much. to chat with.
“It is mainly limited by the current level of scientific theory, but there are also some complicated reasons for this.”
But for Fang Ran’s curiosity, Klim still answered with a smile, and then softly and gently continued to explain:
“Technology research and development It needs a purpose. The emergence of rockets during World War II made the great powers feel a sense of military crisis, and they competed for talents in the form of a space race.”
“Let the space technology of that period advance by leaps and bounds, and the end of the Cold War naturally also greatly released. After slowing down, more people focus on research in other fields.”
Like Fang Ran likes to chat with him, he also likes this kind of small chat, which is
used to answer the curiosity of his most precious friends rather than being used as a tool of knowledge. Makes Klim even more happy.
“After all, to the extent that global resources have not yet been fully exploited and utilized, and space navigation has not yet been developed to the point where space navigation is considered, politics, capital, productivity… and many factors,”
“This field is still under the premise of human beings’ social abundance. Exploring and exploring.”
Speaking of this, seeing Fang Ran’s face of “oh-oh-oh” unclear, Klim chuckled at him again and added:
“If there is an alien someday, or the life of the earth is hanging by a thread I need to grasp the life-saving straw of spaceflight, and maybe I will soon enter the era of interstellar travel.”
“No, I always feel that I may not live by that time…”
Hearing Klim’s “comfort”, Fang Ran spoke a little helplessly, but soon he looked up at the beautiful Milky Way above his head and laughed again. He
could not see the disappointment at all. Instead , he let out an expectation of happiness.
“Isn’t space navigation unrealistic yet…”
“Although the distance to the deep space level is still far away, there are still some realistic ideas at close range.”
Also sitting on the stump, playing with the bonfire with branches, Li Ze, who was listening quietly, spoke at this
moment , and Fang Ran, who was suddenly curious, shook his upper body forward and asked the novelty: “Eh! More realistic? What is it?”
“For example, a space elevator.”
“Space elevator? “
Hearing Li Ze’s answer, Fang Ran’s mind first came up with the’metal pillar’ that he had forgotten in which work he had seen. His eyes flashed with curiosity and brilliance:
“This thing was not made up in film and television. Is it useful?”
“Very useful…”
Fang Ran’s statement was repeated, and Li Ze pondered for a while before
speaking slowly: “It should be said that it has an epoch-making effect.”
And Fang Ran is more clear . Kerim gave him a more detailed explanation,
“At the current level of spaceflight, the most troublesome thing about entering space is to overcome the gravity of the earth. For this reason, most of the rockets are fuel for acceleration, and they carry cargo. The human part is very small,”
recalling the papers he had read before, he gave a simple and clear example and said:
“To transport a kilogram of payload into space, even if it is very economical, it costs about 20,000 US dollars. It costs at least millions of dollars for one person,”
“But if there is a space elevator, the price can be reduced to one percent, of course, not counting the cost of the elevator itself.”
Eh! ? so cheap?
While surprised at this point, Fang Ran heard Li Ze say some more far-reaching meanings.
“A simpler way to enter space means that people can transport resources more easily, build space bases more easily, and acquire knowledge and theories about space more easily.”
“The first step for mankind to leave the cradle.”
Listen to them Looking at the starry sky above, I imagined a building that directly leads to the sky. People can go straight to space after sitting on it.
Fang Ran looked at Li Ze and Klim, feeling incredible and asked:
“This is really more realistic. It goes straight to space. How heavy is the weight of such a tall building, and how much support does it need to stand on the ground?”
“No, the design theory of the space elevator does not require ground support. It is the same as a synchronous satellite. Relying on gravity and the centrifugal force of inertia in the synchronous orbit.”
“Huh?”
Hearing Fang Ran’s voice, he knew that he must not understand. Li Ze opened a projection on the campfire surrounded by the three, with his fingers on it. Draw the two nested circles and give him a simple graphic to illustrate the basic principle.
“Assuming that the angle of view is over the North Pole, this circle is the earth’s equator, and the outer circle is a synchronous orbit.”
“The synchronous orbit is the object on this altitude orbit. Because of the equal gravitational force and centrifugal force, it will maintain a relatively stationary orbit with the earth.”
I know this!
Regarding Klimkop’s concern, Fang Ran made a stubborn cry in his heart that high school physics had not forgotten…