“Safe Haven” –ALMA Observatory Unveils Earth-Like Planet Creation in Alien Star Systems

protoplanetary disk

 

Astronomers have long puzzled over a paradox of planet creation: once dusty bodies grow to about one centimeter in diameter the dynamics of a smooth protoplanetary disk would induce them to fall in on their host star, never acquiring the mass necessary to form potentially habitable planets like Mars, Venus, and Earth.

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