乌鸦
发表于 2025-3-21 17:44:29
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endarterectomy
发表于 2025-3-21 22:09:44
The Dream of Flight and the Vision of Tomorrow,t the universe presents us while enjoying the rewards of discovery and new sources of energy production. In this possible future access to space is not limited to a few but enabled for many, beginning an era of interplanetary and eventually interstellar migration of our species into the cosmos. Our
轻打
发表于 2025-3-22 01:48:52
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投票
发表于 2025-3-22 05:17:25
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FID
发表于 2025-3-22 10:13:24
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Entrancing
发表于 2025-3-22 14:25:38
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Entrancing
发表于 2025-3-22 20:56:56
Exploring Other Star Systems,tion of a suitable destination is a fundamental prerequisite to launching any interstellar probe. Such a venture will require an enormous amount of effort, time and money; and mission planners need to be sure that they are sending the probe to the right place. When it finally reaches its destination
原谅
发表于 2025-3-23 00:53:09
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overshadow
发表于 2025-3-23 02:32:02
Electric and Nuclear-Based Propulsion,d effort humans have gradually learned what exactly an atom is and how to tame it. It is true that nuclear energy carries negative side effects through which history records the consequence. However, it is also true that the energy released from atoms is at least a million fold greater than can be o
洞察力
发表于 2025-3-23 05:54:46
Sails & Beams,hemes depend upon the exploitation of solar or laser energy for propulsion. The utilization of natural energy sources in space seems like a prudent way to conduct exploration missions, having the advantage of minimizing fuel mass for the spacecraft or even negating entirely the need to carry a react