This category has the following 15 subcategories, out of 15 total.
- ► Fermi paradox (13 P)
- ► Interstellar travel (3 C, 46 P)
- ► Oort cloud (12 P)
- ► Wormhole theory (11 P)
Pages in category "Astronomical hypotheses"
The following 30 pages are in this category, out of 30 total.
- Brane cosmology (physics)
- Lost Cosmonauts (unsolved)
- Neocatastrophism (astronomy)
- Oort cloud (astronomy)
- Particle chauvinism (astronomy)
- Quantized inertia (physics)
- Rare Earth hypothesis (astronomy)
- Shadow life (biology)
- Vulcan (hypothetical planet) (astronomy)
- Wormhole (physics)