Chapter 164: An Alien Spaceship Resembling a Satellite?

"Even if there is life on it, organisms like small fish or shrimp won't appear."

"Does everyone know why?"

He smiled and posed a question.

Such a simple little question naturally posed no problem for the educated audience.

"I know this. With a diameter of 504 kilometers, Enceladus is too small!"

"Exactly. Such a small satellite has even less Gravity. Even if there is liquid water on it, the water exists beneath the icy surface of Enceladus."

"Given our limited technology, if we imagine it in depth, everything within a few kilometers beneath the surface of Enceladus exists attached to the underside of the ice."

"Even if microorganisms were born there, they would be attached to it; it lacks the prerequisites for complex organisms to appear."

"..."

Listening to the bullet comments relayed by the director, Jiang Zhe gave a thumbs up to the camera, "That's right, everyone answered well."

"Enceladus is an ice ball. It does not have the conditions for complex organisms to appear, only microorganisms. I can guarantee this!"

"Besides that, there is also Titan. It is large enough, and its Gravity is not very weak, but it is covered in liquid methane, so it also lacks the possibility of life existing."

"Next, we need to cast our gaze a bit further and take stock of the prerequisites for the appearance of beings like us humans. Only by understanding this will we know why Earth is so special and why there are no aliens in the universe!"

For the middle-aged and elderly viewers in households everywhere, this content was truly fresh.

For those elderly folks, these were things they wouldn't normally bother to learn about.

Who would have thought that, beyond their common knowledge, water is actually common in the universe.

Consequently, those elderly people all made the program mandatory viewing.

Although the children were unwilling, they couldn't withstand the "tyranny" of their parents.

"Therefore, the appearance of life might not be difficult, but the appearance of complex life is extremely difficult."

"I've calculated that for life like us humans to appear, at least 20 conditions must be met for life to be born on a planet."

"Next, please follow me as we enter the origins of life!"

As Jiang Zhe finished speaking, a blue planet appeared on the whiteboard behind him.

"One: First, this planet revolves around a star, but there is a prerequisite: its orbit must be circular, rather than suddenly circular and then elliptical."

"Our Earth fits this orbital rotation method perfectly."

"Take Sirius in the universe, for example. It is composed of Sirius A and Sirius B. It is a typical binary star system, and there are no planets near it. Even if there were planets, they would revolve around Sirius A for a while and then around Sirius B. In this way, the planet's stability cannot be maintained, and life naturally cannot appear."

"Of course, there are also triple star systems, but that is irrelevant to today's topic; you can look that up yourselves."

"As for binary star systems, it is possible for life to be born there, but the probability is too low; it is far more difficult than the appearance of life on Earth!"

"Therefore, we can only set our sights on a [Single Star System]; a life-bearing galaxy composed of one star: the Solar System."

Binary and triple star systems were indeed a first encounter for those who didn't understand astronomical knowledge.

After a brief search on the internet, they discovered that such spectacular systems actually exist in the universe!

"Two: This planet must have appropriate mass."

"If the mass is too large, the Gravity is greater, which is unfavorable for the birth of human life."

"If the mass is too small, the Gravity is smaller, and it is even more impossible for humans to appear!"

"Just like Enceladus, which we discussed earlier; its volume is too small and its mass is too small. If you say it has microorganisms, I guarantee it does, but there will absolutely be no humans."

"The third point is a bit magical!"

At this point, Jiang Zhe smiled.

"That is, this planet must have a relatively large satellite!"

"The size of this satellite should ideally be about the same size as the Moon."

"As a satellite, the Moon is actually too big, but its size has its advantages—it can stabilize Earth's rotation axis."

"As everyone knows, our Earth has an axial tilt. If there wasn't a satellite as large as the Moon, our Earth would wobble left and right and wouldn't be stable. Fortunately, we have the Moon to fix it in one direction of rotation; the rising and setting of the sun is also due to this factor."

"Enceladus is a satellite of Saturn. Saturn has a diameter of about 116,000 kilometers, Enceladus has a diameter of 504 kilometers, and Titan has 5,150 kilometers."

"Saturn has a diameter of 116,000 kilometers, and its largest satellite, Titan, only has a diameter of 5,150 kilometers."

"Our Earth has a diameter of 12,700 kilometers, and the Moon has a diameter of about 3,700 kilometers."

"Everyone, compare it slightly: is our Earth's satellite too large, yet somehow just right?"

After saying this, he revealed a thought-provoking smile.

As his words fell, it immediately caused the audience to ponder.

These things were not unfamiliar to astronomers, who nodded in agreement without too much thought.

But many of the viewers were encountering this for the first time, and a deep sense of doubt arose spontaneously.

"That's right, Saturn has a diameter of 116,000 kilometers, and Titan is its largest satellite at 5,150 kilometers; the ratio reaches a staggering 23 to 1."

"The ratio of Earth's diameter to the Moon's diameter reaches 3 to 1. Comparing it like this, what an exaggerated ratio!"

"So Teacher Jiang said that the Moon is indeed too large for Earth, and it's not abruptly large; it's just right to bring good periodic operation to the Earth."

"Wait, listening to him say this, I always feel like the Earth and the Moon seem to have been designed!"

"Same here. I compared the ratios of planets to satellites within the Solar System; they all reach a ratio of many to 1, and only Earth and the Moon are 3 to 1. If 3 to 1 can lead to life, how did Earth know? I mean: how did the other party know that 3 to 1 would allow life to appear on Earth?"

"To the person above, your statement is a bit abrupt; it's because only 3 to 1 can lead to life, not that it became 3 to 1 after life appeared. You have the cause and effect reversed."

"No, I didn't get it wrong; it's just that the Earth and the Moon are very unnatural. If Venus had life before, then Venus must have had a satellite of its own; otherwise, life on Venus could not have been born stably!!"

"..."

Some clever viewers could draw inferences from one instance, immediately listing the abrupt discrepancies.

Soon, the bullet comments from the audience's heated discussion reached Jiang Zhe's ears again.

Facing this question, Jiang Zhe explained straightforwardly: "As for this satellite of Venus, in the past, people did indeed witness it; but it disappeared very quickly, so it became an urban legend."

As soon as these words were spoken, the experts in the lecture hall were shocked, becoming increasingly serious.

They all knew that the content behind this was indeed an [Unsolved Mystery].

Currently, the scientific community has various speculations, but none can provide a correct answer.

"Actually, it's like this!"

"We all know that for life to be born, there must be a satellite to stabilize the planet's rotation."

"In the Solar System, Mercury and Venus are planets without satellites; this is our current consensus."

"Venus is the planet whose orbit is closest to Earth, and its mass and volume are not much different from Earth's."

"But Earth has the Moon as a satellite, while Venus does not. However, 300 years ago, that wasn't the case."

"Back in August 1686, the famous French astronomer and Station Manager Zhao of the Paris Observatory, Giovanni Cassini, announced that he had discovered a satellite of Venus, but it disappeared very quickly. This [quickly] lasted for about several years."