A red dwarf star could support 24 habitable, Earth-sized planets.
A star system with four gas giants could support 36 habitable worlds.
A binary star system supporting 60 habitable planets.
Source: New Scientist
Why settle for one habitable planet, when you can have 60? An astrophysicist has designed the ultimate star system by cramming in as many Earth-like worlds as possible without breaking the laws of physics. Such a monster cosmic neighbourhood is unlikely to exist in reality, but it could inspire future exoplanet studies.
Sean Raymond of Bordeaux Observatory in France started his game of fantasy star system with a couple of ground rules. First, the arrangement of planets must be scientifically plausible. Second, they must be gravitationally stable over billions of years: there is no point in putting planets into orbit only to watch them spiral into the sun.
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