But the lack of progress by the IDC also had a positive effect: It forced people to give up the illusion of a miracle. In actuality, the public had long ago stopped believing in the miracle, since they didn’t even know of the existence of Yun Tianming’s message. The political pressure exerted by the populace forced Fleet International and the UN to shift their attention from Yun Tianming’s message to searching for ways to preserve Earth civilization based on known technologies.
Viewed at the scale of the cosmos, the destruction of Trisolaris had occurred right next door, giving humans a chance to observe in detail the complete process of the extinction of a star and to gather massive amounts of data. Since the star that was destroyed was very similar to the Sun in terms of mass and position in the main sequence, humanity could potentially create a precise mathematical model of the catastrophic failure of the Sun in the event of a dark forest strike. As a matter of fact, this research had begun in earnest as soon as those on Earth had witnessed the end of Trisolaris. The direct result of research in this direction was the Bunker Project, which took the place of Yun Tianming’s message as the focus of international attention.
I. Projected timeframe from exposure of Earth’s coordinates to dark forest strike against the planet: optimistic scenario, one hundred to one hundred fifty years. Average scenario: fifty to eighty years. Pessimistic scenario: ten to thirty years. Plans for the survival of the human race used seventy years as a benchmark.
II. Total number of individuals who would need to be saved: Based on the rate of decrease in world population, the number would be six hundred to eight hundred million in seventy years.
III. Projected course of the anticipated dark forest strike: Using data from the destruction of Trisolaris’s star, a mathematical model of the explosion of what would happen to the Sun if struck in the same way was constructed. Simulations based on the model showed that if the Sun were struck by a photoid, all terrestrial planets within the orbit of Mars would be destroyed. Immediately after the strike, Mercury and Venus would be vaporized. The Earth would retain some of its mass and keep a spherical form, but a five-hundred-kilometer surface layer, including all of the crust and part of the mantle, would be stripped away. Mars would lose a layer about one hundred kilometers thick. Later, all the remaining terrestrial planets would lose velocity due to the material released by the solar explosion and crash into the surviving core of the Sun.
The model indicated that the destructive force of the solar explosion—including radiation and impact from solar material—would be inversely proportional to the square of the distance from the Sun. That is, the destructive force would diminish rapidly for objects far enough from the Sun. This would allow the Jovian planets to survive the explosion.
During the initial phase of the strike, the surface of Jupiter would be greatly disturbed, but its overall structure would be undamaged, including its satellites. The surfaces of Saturn, Uranus, and Neptune would also be disturbed without deeper damage. The dissipating ejected solar material would slow the orbits of the planets down to some degree, but later, as the solar material formed into a spiraling nebula, the angular velocity of its spin would match that of the Jovian planets and not degrade the orbits of those planets further.
The four gas giants, Jupiter, Saturn, Uranus, and Neptune, would survive a dark forest strike relatively unscathed. This prediction was the fundamental premise for the Bunker Project.
IV. Abandoned plans for the survival of the human race
1. Stellar Escape Plan: technically impossible. Humanity could not gain large-scale stellar navigation capabilities within the timeframe required. No more than one-thousandth of the overall population could fit into stellar escape arks. Moreover, it was highly unlikely that such arks would be able to locate and reach habitable exoplanets prior to fuel exhaustion and permanent breakdowns in long-term life support and ecological cycling systems.
As any plan along these lines could ensure the survival of only an extremely small portion of the total population, it violated the fundamental values and moral principles of the human race. Politically, it was also unfeasible, as it could lead to massive social upheaval and the total collapse of society.
