Arrival as Light

Chapter P of 92540Covers 25400:55 in the sim

What happens when a mind arrives as light?

Only a pattern travels. At Saturn, 28 light-years away fiction, a transmitter reads your state, a pattern of about 1.0 × 10¹⁷ bits, and writes it onto a laser beam. That size is the guide's estimate, and whether a mind can run as software at all is unsettled frontier. The beam crosses the gap at the speed of light, so the signal spends 28 years in flight, and you were sent that many years before First Light. The transmission itself is short: one beam carries one mind in 9.5 seconds design.

The chapter has four beats: the receiver, the beam, the assembly and the sky. The receiver comes first. It is two mirrors, each 1,000 metres across, in orbit near Kindling design. They have to be that large because a laser beam spreads as it travels. After 28 light-years it arrives as a wide, faint patch, and the mirrors collect as much of it as they can of a transmitter that puts out 1 × 10¹² W. A detector turns the light back into data, and the state assembles beside it. The Vigil shows that assembly as a small cyan lattice that grows one block at a time, with a count of blocks beside it. Drawing a mind as blocks is a design choice, and the chapter marks it illustrative.

When the last block is in place you are running. The seed that built this place needed 297 years to cover the same distance, and it carried only a fabricator and one bootstrap mind. The first minds came the way you did, sent blind before the receiver's ready signal reached Saturn. They woke in 2511 and began the rapid building that Doubling describes.

The chapter ends on the sky. A small orange star, Ember, hangs in the dark, and near it is Vesper, a black hole of 12 suns. Nobody sees a black hole directly. What shows is the way it bends the light of the stars behind it, which Ember's Light explains.

Which numbers does this chapter rest on?

The arrival time comes from the beam's bandwidth. The photon budget alone would allow far less, and Bits travel, atoms do not works through the link. How the seed got here, and why a beam can launch a probe but cannot stop it, is in Pushed by light. Why a mind of this size could not simply run as one synchronized thought across the whole swarm is the subject of The Vigil and Big minds are slow minds.