Xeelee Sequence

A spaceship from Earth accidentally crossed through a hole in space-time to a universe where the force of gravity is one billion times as strong as the gravity we know. Somehow the crew survived, aided by the fact that they emerged into a cloud of gas surrounding a black hole, which provided a breathable atmosphere. Five hundred years later, their descendants still struggle for existence, divided into two main groups. The Miners live on the Belt, a ramshackle ring of dwellings orbiting the core of a dead star, which they excavate for raw materials.  

First there were good times: humankind reached glorious heights, even immortality. Then there were bad times: Earth was occupied by the faceless, brutal Qax. Immortality drugs were confiscated, the human spirit crushed. Earth became a vast factory for alien foodstuffs. Into this new dark age appears the end of a tunnel through time. Made from exotic matter, it is humanity's greatest engineering project in the pre-Qax era, where the other end of the tunnel remains anchored near Jupiter.

Wormhole technology has revealed that our sun will die in 5,000,000 years. A race of superbeings, the fabulous Xeelee, owners of the universe, are thought to be responsible. The bizarre and wealthy cult, the Superet, funds two projects aimed at combatting the force that will murder the sun.

Half a million years in the future, on a dead, war-ravaged world at the centre of the galaxy, there is a mile-high statue of Michael Poole. Poole, born on Earth in the fourth millennium, was one of mankind's most influential heroes. He was not a warrior, not an emperor. He was an engineer, a builder of wormhole transit systems. But Poole's work would ultimately lead to a vast and destructive conflict, a million-year war between humanity and the enigmatic, powerful aliens known as the Xeelee. The Xeelee won.

Michael Poole finds himself in a very strange landscape.... This is the centre of the Galaxy. And in a history without war with the humans, the Xeelee have had time to built an immense structure here. The Xeelee Belt has a radius 10,000 times Earth's orbital distance. It is a light-year in circumference. If it was set in the solar system, it would be out in the Oort Cloud, among the comets - but circling the sun. If it was at rest, it would have a surface area equivalent to about 30 billion Earths. But it is not at rest: it rotates at near light speed.