This mystery of how and why their growth is arrested, before they gather enough mass to ignite as stars, is at the heart of the current debate on brown dwarf genesis.

• 目前关于棕矮星起源的争论，主要是在它们聚积足够的质量而像恒星般燃烧发光前，这个神秘的因素如何与为何遏止了它们的成长。