你们正致力于向火星上发射人造宇宙飞船。
三十多年以后，它们成了离地球最远的人造物体，旅行者宇宙飞船都已飞出太阳系，飞向茫茫宇宙深处，不断地探索新的星球。
More than three decades later, they have become the farthest man-made objects from Earth, reaching out in the darkness to overtake earlier missions to oblivion【1】.
想象一下这样的情形：高度发达的人类社会从黑洞获得大量能源，比如从坍塌的恒星提取，或者是人造微小黑洞为宇宙飞船提供能源补给。
Imagine the scene: highly advanced civilisations get enormous amounts of energy from black holes, be it extracting it from collapsed stars or making artificial mini-holes that power spaceships.
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