10²⁵ meters = 10,000,000,000,000,000,000,000 kilometers

There's more: You are now viewing a cube that encompasses 700 million light-years of space. Every point is a galaxy of a group of galaxies. 700 million light-years sounds like a huge volume of space—and it truly is. But it's only three percent of the total volume of the universe (we think)! Just three percent of the way to the beginning of time . . .

But wait! The cube seems to have a wedge-shaped section taken out of it. Is this some deep structural defect in the universe?

No, it's an illusion; it is what scientists call "an artifact of the data." It's happened because what you're seeing here is all that we can see from the vicinity of Earth.

And we cannot see through the dense core of our own galaxy, the Milky Way. So the "butterfly" or "wedge" is actually just missing data. We're pretty sure there are galaxies there, but we won't be able to see them until we can send a telescope a few million light-years away from Earth. Or, maybe, until we hear about it from the intelligent extraterrestrial astronomers via the intergalactic Internet . . .