Because the Clock Tower had an Astronomy Department.
"Mars Retrograde is a very troublesome point for the Geocentric Theory—or rather, the Geocentric Model—to explain. It can also be seen as a flaw in the Geocentric Model. But the appearance of Mars Retrograde... precisely proves that the Geocentric Model has been established."
It was precisely because that flaw had appeared that it signified the emergence of the Geocentric Model.
Tohsaka Tokiomi had already realized this.
"What's the problem with that?" Matou Kariya still did not understand.
Tohsaka Tokiomi sighed.
"Tokiomi!" Matou Kariya shot Tohsaka Tokiomi a glare.
"The core of the Geocentric Model is Earth. And Earth has now become the core of the world. In other words, once the Geocentric Model is established, it means the Earth Holy Grail's power has been amplified to its maximum, because it represents the core of the world," Tohsaka Tokiomi said.
"What's the problem with that?" The look on Tohsaka Tokiomi's face that said, "You're an outsider to magecraft," greatly irritated Matou Kariya. However, Matou Kariya had no intention of giving up his questioning because of it.
"The Great Hollow is collapsing." As one of The Three Families, Tohsaka Tokiomi was already analyzing the situation.
On the level of magecraft, Tohsaka Tokiomi might not have possessed Kischur's talent, but as one of The Three Families of the Holy Grail War, Tohsaka Tokiomi was still highly knowledgeable about the Holy Grail.
"If the Great Hollow collapses, the substances of the Root may very well pour out in reverse and engulf Earth—the universe. At that point, the universe itself will become part of the Root." Tohsaka Tokiomi speculated, "But... would anyone really commit such madness? Or is this All the World's Evil's so-called 'salvation'? But if that happens, the world itself will become part of the