<i>Brown dwarfs are substellar objects</i>[1]<p>Perhaps if it doesn&#x27;t make it as a star, then it&#x27;s not binary? It&#x27;s not quite a planet system, but maybe one can call it a &quot;Solar system&quot;?<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Brown_dwarf" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Brown_dwarf</a><p>This might be interesting. In the same article, they call a pair of brown dwarves a &quot;a binary system&quot; rather than a binary star.