You can simulate the equations [1] and debate if it matches observed objects.<p><a href="http:&#x2F;&#x2F;arxiv.org&#x2F;pdf&#x2F;1601.00921v1.pdf" rel="nofollow">http:&#x2F;&#x2F;arxiv.org&#x2F;pdf&#x2F;1601.00921v1.pdf</a>