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8 votes
1 answer
872 views

Does the US Navy guard SpaceX drone ships and make sure bad actors don't abscond with critical technology on the high seas?

SpaceX loses the center core of its Falcon Heavy rocket due to choppy seas While I thought my question How vulnerable could space launch vehicles be to a “lone gunman”? was just my tangential ...
uhoh's user avatar
  • 151k
2 votes
1 answer
780 views

Criticism of SpaceX Mars colonization plan [closed]

I keep reading about SpaceX advancements toward the long-term goal, Mars colonization. Primarily, I read the excellent Wait But Why articles about the topic, which gave a not-so-technical version of ...
Gal A.'s user avatar
  • 121
16 votes
1 answer
6k views

What improvements have SpaceX made to their proprietary Phenolic Impregnated Carbon Ablator (PICA-X) heat shield?

PICA-X is a SpaceX proprietary variant on the NASA Ames developed PICA (Phenolic Impregnated Carbon Ablator) heat shield material. NASA quotes decades of rigorous research, testing and development ...
TildalWave's user avatar
  • 76.4k