How long does it take for a civilization to rise from one of hunter-gatherers to interstellar spaceflight? Or to fall back again to primitive, subsistence levels? Years? Decades? Centuries? Millennia?
For the cheela, just a few hours.
The cheela are among the most intriguing aliens ever to appear in science fiction and are both at the same time quite alien and also quite familiar. They don't live on any terrestrial world like Earth, Mars, or even the Moon. They inhabit the surface of a rapidly rotating neutron star 20 kilometers in diameter, one dubbed Dragon's Egg, visited by humanity in the year 2050.
Dragon's Egg is unimaginably harsh by human standards; a crushing surface gravity equivalent to 67 billion Earth gravities, an 8200 K surface temperature, a massive magnetic field, and a rotation rate of about 5 times a second.
Though the typical cheela weighs as much as a human, they are little larger than a sesame seed. Instead of being comprised of what the cheela called "expanded matter," they are instead made up of nucleonic matter. The nuclei in the cheela body have lost their electron clouds, crushed by the high gravity and intense magnetic fields into a tiny and super dense form (one that will collapse at a touch anything made of normal matter). In physical appearance they are glowing, white hot vaguely slug-like organisms, with a slug-like tread used for locomotion and seeing through a ring of twelve stalked eyes all around their periphery and able to manipulate items through a series of limbs.
The cheela though are stranger yet. Not only does the neutron star move fast, the cheela live and die very fast, by human standards at least. One day on Egg (what the cheela call their world) is equivalent to 0.2 human seconds; the cheela live their lives a million times faster than humans do. A cheela year only lasts 29 human seconds. A cheela generation is 15 minutes apart, and a cheela lives on average about 45 minutes, an entire life of growing up, going to school, mating, having a career, and retiring. One hundred cheela generations will have come and gone in the span of a single human day.
_Starquake_ is the sequel to the brilliant earlier novel by Robert L. Forward, _Dragon's Egg_. Owing to the nature of time in the book, it is really more a continuation of the first book, not a sequel, as only minutes I believe separate the events from the end of the first book from the opening events in the second. The cheela, having advanced from basically what we might call something akin to Neolithic times to a civilization that has mastered the use of artificial black holes in the space of about a human day or so (these events were covered in the first novel), have long since surpassed humanity's technical achievements. The astronauts who visited Egg were about to leave for home but a disaster occurs, one that is averted only by what are to human standards very quick action on the part of the cheela. Grateful for the assistance, the humans pledge that they will aid the cheela any way they can. The cheela, while quite polite, decline, wondering how they could ever provide any additional help to them; they wish their human friends a safe trip home.
As one might guess from the title, a massive starquake occurs, killing nearly every cheela and destroying their civilization. Can humanity help? How will the few brave cheela that survive the catastrophe rebuild their world?
Owing to the time perception differences, by necessity most of the book is told from the point of view of the cheela, as many interesting cheela live epic lives trying to save themselves, their friends, their world, to remake their civilization in the span of mere minutes and hours for their human friends. I think the book was a bit slow at first, as the author spent a good deal of time explaining how cheela spacecraft, space elevators, and launcher facilities might work, something hard to manage as it is in our world but to me inconceivably difficult in a world where a vessel needs to achieve a significant fraction of the speed of light in order to reach escape velocity and make it into space. A bit technical at times, once the starquake occurs the book becomes quite gripping, a wonderful story of heroes, villains, and great personal sacrifice.
Definitely one of the most original science fiction sagas out there and well worth reading.
less
0 comments
Post a comment