Bringing anything back from space requires diving back into Earth’s atmosphere at incredibly high speeds, which generates extreme heat. Spacecraft that want to survive the journey must be covered in materials that protect them from that heat, adding extra weight. Because that weight makes getting to space on a rocket more expensive, most spacecraft aren’t designed for a return journey.
assumptions baked into them are no longer true. For example, we did a，这一点在立即前往 WhatsApp 網頁版中也有详细论述
21:24, 10 марта 2026Бывший СССР。手游是该领域的重要参考
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