Ripe for colonisation ONE of astronomy's biggest changes of perspective in recent years has been the realisation that planets are abundant in the cosmos. But not everywhere. Collections of stars called globular clusters seem bereft of them. Globular clusters are roughly spherical collections of hundreds of thousands of stars. These, in turn, are among the oldest stellar inhabitants of galaxies. But though the Milky Way, the Earth's home galaxy, has more than 150 globular clusters, so far only a ...
Ripe for colonisation ONE of astronomy's biggest changes of perspective in recent years has been the realisation that planets are abundant in the cosmos. But not everywhere. Collections of stars called globular clusters seem bereft of them. Globular clusters are roughly spherical collections of hundreds of thousands of stars. These, in turn, are among the oldest stellar inhabitants of galaxies. But though the Milky Way, the Earth's home galaxy, has more than 150 globular clusters, so far only a ...
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