The total mass of the Oort cloud is guessed at (3×10^25 kg), or about five Earth masses. With dark matter, we are talking about roughly 5.6x the amount of the <i>total solar system</i> mass. The Oort could would need to be about 371,691x more massive than it is.<p><a href="https:&#x2F;&#x2F;www.wolframalpha.com&#x2F;input&#x2F;?i=mass+of+the+solar+system+*+5.6+%2F+%283%C3%9710^25+kg%29" rel="nofollow">https:&#x2F;&#x2F;www.wolframalpha.com&#x2F;input&#x2F;?i=mass+of+the+solar+syst...</a>