> In the new paper, scientists write that if a wormhole does exist at Sagittarius A, nearby stars would be influenced by the gravity of stars at the other end of the passage. As a result, it would be possible to detect the presence of a wormhole by searching for small deviations in the expected orbit of stars near Sagittarius A.
I assume that would be a rather large worm hole, for us to detect the gravitational effects on stars that exist on the other side.
I wonder if there's any approach to detecting micro-wormholes closer to our own star? Perhaps by setting up tens of thousands of micro-satellites around (Starlink), blasting radio waves in all directions, and seeing which ones don't make it to the receiver?
There is some gravitational anomaly in our solar system. There was a paper from earlier this year suggesting that it might be caused by a small black hole, although I guess there is no reason it couldn't also be caused by a wormhole.
Edit: Here is the paper https://arxiv.org/abs/2004.14192. I misremembered it as a gravitational anomaly, but that is not completely inaccurate (it concerns the clustering of Kuiper belt orbits). The author (Ed Witten) proposes something similar to what you described for detecting the object.
makes entirely too much sense. Altough, I still would question the validity of it, because in cases where there could be VASTLY different masses on the other end. So, the bleed through would only really give an indication of the gravity well on the other side.
Yeah, I thought of that after I replied to your comment and I guess you'd have to use some standard mass located a standard distance.
I'd imagine a unit people would use would be the gravitational force exerted by an object the size/mass of the sun located 1 AU away from the wormhole. Though I imagine there would be some more fundamental unit for measuring this kind of thing.
This also makes me wonder: would accelerating end A of a wormhole have the same effect on the environment around end B of the wormhole as holding end A stationary in a gravity field?
Motivation: Can there be in-universe traversable wormholes which can never be time machines?
Caveat: no I have not studied GR, so if I’m asking the physics equivalent of a CompSci fresher asking how to pass the Turing test, tell me.
>Motivation: Can there be in-universe traversable wormholes which can never be time machines?
There was a paper(?) that noted that specific configurations of wormholes (basically tree shaped, no loops) do not allow time travel. I think it or another paper postulated some mechanism for wormholes collapsing if they violate that property.
https://www.sciencedaily.com/releases/2019/10/191023135913.h...
> In the new paper, scientists write that if a wormhole does exist at Sagittarius A, nearby stars would be influenced by the gravity of stars at the other end of the passage. As a result, it would be possible to detect the presence of a wormhole by searching for small deviations in the expected orbit of stars near Sagittarius A.
I assume that would be a rather large worm hole, for us to detect the gravitational effects on stars that exist on the other side.
I wonder if there's any approach to detecting micro-wormholes closer to our own star? Perhaps by setting up tens of thousands of micro-satellites around (Starlink), blasting radio waves in all directions, and seeing which ones don't make it to the receiver?