[TheOtherHobbes]

Maybe. I think it's more likely that an alien probe - assuming there are aliens and they fly probes - would be the size of a cubesat, and we wouldn't even notice it.

Perhaps Oumuamua was the mothership and the solar system is now swarming with cubesats we're not noticing.

[hermitcrab]

>I think it's more likely that an alien probe - assuming there are aliens and they fly probes - would be the size of a cubesat

Or maybe the size of a sub-atomic particle, as in the sci-fi Novel 'The 3 body problem'.

https://three-body-problem.fandom.com/wiki/Sophons

[callc]

Does anyone else see a timer ticking down in their vision or is it just me?

Time to quit my job at the LHC and be a baker.