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Old November 3rd 18, 09:35 PM posted to sci.astro.research
jacobnavia
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Default Spaceship Oumuamua

Oumuamua wasn't a "traditional" spaceship but it is a solar sail.

https://arxiv.org/pdf/1810.11490.pdf

This point of view is proposed by reearchers Shmuel Bialy and Prof.
Abraham Loeb.

Oumuamua would be then, a thin (1mm) sheet designed to reflect as much
as possible solar radiation. This would explain the acceleration that we
see as it leaves us.

[Moderator's note: They discuss a "width" of 0.3--0.9 mm for the sheet.
I would use "thickness" here. -P.H.]