Moon, Planet or Star? Search for Life in the Universe
"Planet-forming, or protoplanetary, discs are the precursors to planets. Astronomers speculate that the disc circling OTS 44 has enough mass to make a small gas giant planet and a few Earth-sized, rocky ones. This begs the question: Could a habitable planet like Earth sustain life around a brown dwarf?
'If life did exist in this system, it would have to constantly adjust to the dwindling temperatures of a brown dwarf,' said Luhman. 'For liquid water to be present, the planet would have to be much closer to the brown dwarf than Earth is to our Sun.'
'It's exciting to speculate about the possibilities for life in such as system, of course at this point we are only beginning to understand the unusual circumstances under which planets arise,' he added."
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