- Country in Europe | 0, 1k, 22
- Europe | 75, 1k, 25
- Continent | 0, 3k, 81
- Earth | 0, 3k, 87
- Solar System | 0, 3k, 89
- Orion Arm | 0, 3k, 90
- Milky way | 15, 3k, 91
- Local group | 0, 3k, 92
- Virgo Supercluster | 0, 3k, 93
- Astronomy | 0, 3k, 105
- Natural science | 0, 49k, 1k
- Science | 0, 53k, 1k
- Ciro Santilli's Homepage | 262, 182k, 3k
- Infinitesimal | 24