Centaurus A vs NGC 185 2
Centaurus A vs NGC 383 3
Kepler-452b vs Proxima Centauri b 3
HD 189733 b vs Gliese 581 c 4
NGC 2158 vs Messier 7 2
Centaurus A vs NGC 3115 3
Pinwheel Galaxy vs Antennae Galaxies 3
Makemake vs 50000 Quaoar 5