Could 'Oumuamua be an icy fractal aggregate ejected from a protoplanetary disk?
No one can say for certain what Oumuamua actually is-- other than it is &quot;a surprise&quot;.<p>What it really is, IMHO, is a call to action for better instrumentation so that the next time one of these things pays us &quot;a visit&quot;, we&#x27;re in a position to find out more about it.