Seeing the model that had already appeared before her, Robin no longer denied it, and at the same time, she was completely certain that her thoughts were indeed being projected in this "dream"!
Robin became even more cautious, no longer glancing at the ancient Poneglyph around her—she was unwilling to reveal their contents until she was certain whether the person claiming to be "Sea King" could be trusted.
"That's right, this is the Ohara celestial model... All the research related to the Poneglyph was conducted in secret back then. Ohara is most famous outside of the world for being called the 'Island of Astronomy.'" Robin's tone was calm, but his heart was churning.
Because it reminded me of my former hometown, and of the people from my past...
To warn the world and explore the consequences of history, the World Government named Ohara, which has already been destroyed, "the Island of History." Now, when ordinary people hear the name Ohara, they only think of a group of ruthless archaeologists and have long forgotten "the Island of Astronomy."
"Astronomy...?" Sig stared at the model, lost in thought.
Indeed, there is such an Ohara in the original work, in a very prominent position in the Tree of Knowledge.
This model appears to be based on observations centered on the Blue Star. At the very center is the Blue Star, which is equipped with an axis and can rotate. Around the Blue Star are other orbits, with satellites orbiting the Blue Star.
The internally assembled gears are extremely precise; once the blue planet is turned, other planets will also rotate and revolve accordingly.
There were eight satellites in total, orbiting the blue planet in different orbits. Sig felt a little awkward at first, but then he realized why.
"No moon?" Sig asked, looking at the virtual celestial model on the hot spring pool.
"No," Robin answered directly, since it was obvious at a glance.
Unlike Earth, where Sig lived before his time travel, Blue Star has eight natural satellites orbiting it, and that doesn't even include the Moon.
Sig was scratching his head over this very point—why was the most important thing, the moon, missing? And the Sun, too...?
In this case, the model seems unable to simulate the projection relationship of the four islands when the "Sun's Harmony" occurs!
Perhaps sensing Sig's reaction and his strong thirst for knowledge, Robin, as a scholar, prompted him with a suggestion. "Dr. Clover has often lamented in front of this model... that humanity is truly insignificant."
"Indeed, compared to the vast starry sky," Sig agreed, though he was still somewhat disappointed.
Unfortunately, Robin is an "archaeology doctor," having become a "doctor" of Ohara at the young age of eight. Robin's intelligence is beyond doubt, but... expecting her to be an all-rounder is asking too much.
If Robin had lived in Ohara for decades, she might have gained more knowledge, but Ohara was destroyed when she was eight years old!
The reason I have such a deep impression of this model is twofold: firstly, because Dr. Clover often talked to himself while looking at the celestial model; and secondly, because Dr. Clover was worried that Robin's thirst for archaeological knowledge would put her in danger, so he strongly advised her to turn to the field of astronomy.
Unfortunately, Robin didn't actually read many books on astronomy; he just pretended to, but his heart was really in archaeology.
The star model operated silently, as if Ohara were still there and it had not been destroyed, showing no signs that it was merely a projection of Robin's memories.
Robin stared at the model, lost in thought, thinking of familiar people and familiar things.
Just as Sig was about to comfort Robin, he looked at the model of the orbits simulating the movement of stars and suddenly realized something.
Then Sig snapped his fingers, and everything around him disappeared, leaving only the enormous model. Even the supports and tracks on the model vanished, leaving only the planet itself, as if it were a real planet orbiting in the universe.
Robin couldn't help but glare at Sig, seemingly complaining about his mood-ruining behavior.
But then he saw Sig standing in the same void as himself, looking at the "model" with a serious expression. Then, the earth appeared around him and himself—looking at its uneven surface, Robin felt a sense of familiarity... perhaps it was the moon?
Is this a simulation of what I and he would look like on the moon?
Looking up at the huge model of the stars, with the moon beneath my feet as a comparison, it now felt like a real celestial body!
"Is this the moon? Why... isn't it rotating?" Robin looked at Sig, puzzled.
Sig said calmly, "If we're unsure how to turn, it's better not to turn at all..."
Well, since it was only simulated in a dream, without crucial information, Sig couldn't fully simulate the moon's movement.
What can be determined is that the Moon's approximate location is farther from Earth than any other satellite, meaning it is larger than any other satellite.
After all, from the perspective of Earth, the Moon is much larger than other the Star, and this is not a case of objects appearing larger when closer and smaller when farther away!
"Do you think it's possible that the moon isn't a satellite of Earth?" Sig suddenly asked.
"Perhaps," Robin said without much hesitation.
From the beginning, Robin didn't have the idea that "the moon must be a satellite of Earth," Sig had the common sense that "the moon is a satellite of Earth," which is why he thought it was a matter of course.
In reality, while the moon in the One Piece world is the largest the Star visible from Earth, it is not necessarily Earth's satellite. The moon has never introduced itself as such; it's just that the two have similar orbital periods, and the Moon can be seen almost every night on Earth.
Through the "model," Sig pointed into thin air, and then... the Sun appeared.
The Sun, the blue planet, and the moon are aligned in a line, just as Sig did when he conjectured the "Sun's Harmony".
However, this time there are eight more satellites, also orbiting the Earth.
Sig's hand gently moved towards the direction of Blue Star, as if accelerating time, and indeed Blue Star and its satellites accelerated their rotation.
From the Moon's perspective, Earth appears as a giant spot on the Sun, blocking Sun center—a phenomenon that actually only occurs during "Sun's Harmony." Sig assumed that the Sun, Earth, and Moon are always aligned, maintaining a state of "Sun's Harmony," and simply operated the other eight satellites to verify a hypothesis.
As the planet's rotation accelerates, the relationship between the eight satellites and the blue planet changes constantly, and Sig's eyes gradually brighten.
After countless rotations, finally... a "coincidence" occurred!
At this moment, from the moon's perspective, eight satellites are evenly arranged in a circle around the blue planet, and nine the Star are on the same plane, with the Sun on one side and the Moon on the other.
What you see from the Moon is nine "spots" on the Sun, one large and eight small...
Just like the crest of the Kozuki Clan Wano Country, the pattern on the bird's belly—a black circle in the center, surrounded by eight slightly different-sized black circles...
"After twenty years of gazing into the distance, the sun's nine shadows are cast as it rises in the east..."