做事过头
发表于 2025-3-26 22:50:16
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拉开这车床
发表于 2025-3-27 03:53:21
Non-Rocket In-Space Propulsion spacecraft is ground-launched, we might consider a jet as the first stage, where oxygen is ingested from the air instead of carried on board. Other launch alternatives include igniting the rocket while it is suspended from a high-altitude balloon or accelerating it upon a magnetically levitated tra
火花
发表于 2025-3-27 05:24:00
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Glaci冰
发表于 2025-3-27 09:57:40
Principles of Space Sailingf interplanetary space (Fig. 6.1). In a very literal sense, this imagery is very close to the anticipated reality of solar sails. Very large and diaphanous sail-propelled ships will traverse our solar system and perhaps, one day in the future, voyage to another star. From what will these ships be ma
defibrillator
发表于 2025-3-27 14:10:51
What Is a Space Sailcraft?ring nations (augmenting in number and quality) would want to accomplish in the solar system and beyond. Chapter . discussed the concept of sailing, first on Earth seas with conventional sailboats, then by extending the concept to space; there, the first similarities and differences between sea sail
adroit
发表于 2025-3-27 18:41:58
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冒烟
发表于 2025-3-28 01:56:32
Riding a Beam of Lightgentle push that makes a solar sail such a useful propulsion system. Unfortunately, the Sun is also the limiting factor in the overall usefulness of a solar sail. When a spacecraft gets far from the Sun, there is simply not enough light available to provide additional propulsion. Recall the “inverse
要素
发表于 2025-3-28 05:03:05
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检查
发表于 2025-3-28 09:30:22
Building a Sailcraftild and fly large solar sails in space. Germany’s Deutschen Zentrum fur Luft-und Raumfahrt (DLR) took particular interest in solar sail technology in the 1990s and fabricated one of the first large-scale ground-based engineering model sails. The Russians demonstrated in space a spinning 20-m mirror,
Osteons
发表于 2025-3-28 11:27:03
The JAXA IKAROS Mission as a Technological BreakthroughS is the first solar-photon sail deployed in interplanetary space and has demonstrated the sail’s utility in both primary spacecraft propulsion and attitude control, it certainly constitutes a technological breakthrough. Moreover, it is certainly deserving of a chapter in this book! To capture some