A Brown dwarf is a type of celestial object more massive than a planet, but less than one-twentieth the mass of the sun (.05 Solar masses). Brown dwarfs are dim and faint, they are ever fainter than Red dwarfs but they shine for incredibly long periods of time. Life as we know it is not possible round a brown dwarf but life as we don't know it? Who knows? It is theorized that it rains molten iron inside brown dwarfs.
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