If an extraterrestrial civilization can cross interstellar distances and actually reach Earth, then the materials they use for their ship’s hull are probably far beyond anything we classify as “spacecraft materials” today.
A craft like that would need to survive:
- extreme cosmic radiation
- high‑velocity micrometeoroid impacts
- long‑term thermal and mechanical stress
- and possibly the effects of whatever propulsion method they use, especially if it involves manipulating spacetime
So what *kinds* of materials make sense at that level?
Some broad categories people often speculate about:
- advanced metamaterials
- self‑healing or adaptive composites
- bio‑tech hybrid structures
- or something completely outside our current physics models
I’m curious what do you thinks:
Which material categories seem most plausible for a genuinely extraterrestrial, interstellar craft?
by Time_Yesterday_2058
4 Comments
**Submission Statement:**
This post is a short thought experiment about what major material categories could realistically make up the hull and structural components of an interstellar craft built by an advanced extraterrestrial civilization. It’s not a claim or evidence post, just a way to explore what kind of extreme conditions such a vehicle would need to withstand.
Why not a rock?
Drill out Ceres, Eros, Gaspra, Mathilde, etc… seal the interior, add propulsion.
(Keep the Poors away from the water I suppose… better get a hat; to keep the rain off my head…)
If they’re interdimensional then they can just build on the atomic level, atom by atom
Creo que David Grusch ya dejó claro que era interdimemsionales