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In AD 2247, the 18th cycle of the Helios anomaly erupted, and the energy flow of the coronal mass ejection tore a permanent crack in the earth's ionosphere. Three months after the collapse of the magnetosphere, lumps of lead in the equatorial region melted into liquid form in the midday sun, and methane clouds released from the Siberian permafrost formed a poisonous haze that covered one-third of the continent. When the coalition government launched Project Tellus under the Alaska ice cap, the world's remaining population was less than one billion. The outer shell of this 217-meter-long spacecraft is covered with nine layers of graphene-silicon carbide composite armor. Its core "Prometheus" fusion engine can increase the energy conversion rate of deuterium and helium-3 fuel to 41%, which is enough to support a continuous sublight speed of 12 light years. The sleeping capsules for ten astronauts are arranged in a ring under the bridge. On the eve of departure, chief astrophysicist Li Ang sealed a glacial rock sample taken from the Qinghai-Tibet Plateau into the cabin - it was the last piece of freshwater crystal on the earth that was not contaminated by radiation. When the tail flame of Teles 24 extinguished in the orbit of Jupiter, the sun in the surveillance screen was like a boiling iron ball, with giant sunspot groups emerging on the surface swallowing up the past halo. Among the 372 exoplanet coordinates carried by the spacecraft, the nearest Gliese 667Cc is still 7.2 Light-years away, and the Earth's rotation period has been extended from 24 hours to 31 hours. At the last second when the hibernation system was activated, Jiang Chen looked at the shrinking blue planet outside the porthole, and suddenly remembered what his grandmother said when he was a child: "The setting of the sun is not death, it is a change of place to shine."