Notes: How to Spot a Wormhole

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Source: https://www.facebook.com/photo/?fbid=688900985922454&set=a.291883805624176

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The vast majority of black holes we have identified are known either from their gravitational effects on stars around them, or from the jets of material shooting out of their accretion disks. If any of these were actually wormholes, it’s unlikely we would know. However, the Event Horizon Telescope Collaboration’s observation of the polarization around M87* and its follow-up on Sagittarius A* are a different matter. In these cases, we saw the shadow of the object itself against its event horizon, and might hope to notice something if we were really looking at a wormhole.
 

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