Bioalienology Exobiology Exoalienology Alienology
The limit of the known universe Young supermassive galaxies Supermassive black holes Massive supernovae
120 million km 90 million km 200 million km 150 million km
Pulsar Quasar Black Hole White Dwarf
Apollo-Soyuz Test Project Skylab International Space Station Mir
Schwarzschild Radius Trapped Surface Singularity Event Horizon
Buran Energiya Proton Zenit
Saturn & Uranus Mars & Jupiter Earth & Mars Jupiter & Saturn
50.3 light years 6.1 light years 4.2 light years 12.5 light years
Exo-orbitals Exosolar planets Exoplanetary bodies Extrasolar planets