Calibrate
发表于 2025-3-28 18:36:33
Introduction, simple and complex; the principles behind why artificial satellites and rockets achieve orbit are fairly straightforward, but to design machines that can work reliably in space for years—and at times carrying humans—is fairly complex. Written in an accessible language, and with zero equations, this
lymphedema
发表于 2025-3-28 22:17:03
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拘留
发表于 2025-3-28 23:46:36
The Hectic Ride to Space,rms it into heat and work to increase its own positional and motion energy, and with that the energy of the occasional passengers. Rockets are way more than just heat engines: they need structures, instrumentation, data links, piping, guidance, navigation, control, computers, and software. The road
Microgram
发表于 2025-3-29 04:24:30
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aristocracy
发表于 2025-3-29 07:59:13
A Peek Under the Hood,rating and storing power, need radio links, orientation control, computers, and industrial amounts of software, and glue. This chapter describes these building blocks and how their interconnection creates working spacecraft.