A cloud fragment too small to form a star becomes:

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A cloud fragment too small to form a star becomes a brown dwarf, also known as a "failed star." While they have enough mass to trigger fusion reactions in their cores, they do not have enough mass to sustain those reactions and become full-fledged stars. A cloud fragment too small to form a star becomes a brown dwarf, which is a type of failed star that is not massive enough to sustain nuclear fusion in its core and thus does not become a full-fledged star like the Sun.

A Cloud Fragment Too Small to Form a Star Becomes