{"id":"e9dc923d-c8c1-4c56-a327-b9c139e413eb","arxiv_id":"2412.06872","paper_version":1,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":5.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":1,"one_line_summary":"A simulation shows that a nearby wormhole mouth would project a lensed image of the real CMB sky and Milky Way inside its silhouette, offering a possible observational signature distinct from a black hole.","lead":"The paper simulates how the cosmic microwave background and the Milky Way would look when viewed through the throat of a particular wormhole model. It finds recognizable but warped images inside the wormhole silhouette, a pattern it argues would not appear in a black hole shadow.","discovery_kind":"new_application","skeptic_critique":{"model":"deepseek-v4-flash","headline":"I agree with the reader's core concern: the predicted Milky Way and CMB features depend on an unquantified 'nearly identical sky' assumption; a displaced second mouth would erase the claimed signatures.","rationale":"After reading the manuscript in good faith, the central ray-tracing argument is internally consistent: for a traversable wormhole with the stated metric, null geodesics with impact parameter b < q pass through the throat and map the far celestial sphere into the observer's image, and repeated windings near b = q create ring-like copies of that sky. This is a standard lensing phenomenon and the authors' Eqs. (2)-(7) support it. The main soft spot is not the geodesic integration but the boundary condition: the claimed Milky Way and CMB content is put in by hand through the 'nearly identical sky' assumption. The reader's weakest-assumption identification matches mine, so I agree with the CONDITIONAL verdict and recommend leaving it unchanged. I also note a secondary quantitative issue in Section III: the estimate of 100 microJy from a throat with the angular size of the Sgr A* shadow appears too high by several orders of magnitude, since the CMB surface brightness at 240 GHz over a 50-microarcsecond solid angle yields roughly 10^-5 microJy; this affects the observability discussion but not the image-morphology claim. The concrete test proposed above would settle the primary concern by quantifying the maximum allowed mouth-mouth separation before the claimed 'characteristic details' become unrecognizable.","tokens_in":9449,"tokens_out":20021,"duration_ms":217018,"concrete_test":"Use a three-dimensional Milky Way model (e.g., GAIA-based stellar density plus a dust map) to synthesize the optical sky as seen from a point displaced from the Solar System by 1 pc, 100 pc, and 1 kpc toward the Galactic center, while keeping the CMB map fixed for the microwave case. Run the geodesic mapping of Section III and the imaging code for these displaced sky maps, and compare the lensed images with Fig. 7. If the Magellanic Clouds, the Galactic center arc, and the dust band cease to be recognizable inside the throat for a displacement smaller than the 'not very far' separation the model assumes, then the central claim is conditional on an unquantified proximity that is not generically satisfied.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The paper's central prediction—that a wormhole image shows recognizable Milky Way and Planck-CMB features inside the throat—rests on the assumption stated in the abstract and in Section III that the second mouth is so close to the first that the sky seen there is 'virtually identical' to the sky seen from the Solar System neighborhood. This condition is never quantified and its sensitivity is never tested. For the CMB the assumption is nearly automatic, since the CMB is the same to first order everywhere in the local universe, but for the optical Milky Way image it is not: a mouth displaced by even a few hundred parsecs would shift the apparent position of the Galactic center, the Magellanic Clouds, and the dust lanes enough that the specific 'characteristic details' in Fig. 7 would no longer be identifiable. The general wormhole-versus-black-hole distinction (a non-dark interior) survives, but the much stronger claim—that the ring structures are a recognizable image of our own Milky Way—does not, unless the separation is bounded to be extremely small. That bound is neither derived nor discussed in the manuscript.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"The paper numerically integrates null geodesics in the Ellis-Bronnikov-Morris-Thorne wormhole metric and maps the Planck CMB temperature fluctuations and an optical Milky Way image as seen through the throat, assuming that the second mouth is so close that the sky seen there is virtually identical to the local sky. The resulting images show distorted Galactic plane, Magellanic Clouds, and ring structures near the throat silhouette, and the authors interpret these features as characteristic signatures that distinguish a wormhole from a black hole. They also estimate the observable flux and discuss the feasibility of detection with space-ground interferometers.","tokens_in":9623,"tokens_out":4149,"duration_ms":39244,"significance":"If the numerical pipeline is reliable and the near-mouth assumption is satisfied, the paper provides a concrete, falsifiable prediction: a wormhole image would show recognizable Milky Way/CMB structure inside its silhouette, unlike the dark shadow of a black hole. The work is a forward calculation from a stated metric and public sky maps, not an inverse fit, so it is not circular; it also gives an order-of-magnitude flux estimate for observational searches. The main value is in defining a specific observational signature, but the robustness of that signature to physical and numerical assumptions is not yet established.","major_comments":[{"comment":"The paper's central claim that the image contains recognizable Milky Way features (Galactic center, Magellanic Clouds, dust lanes) rests on the assumption stated in Section III that \"the other exit of the wormhole is in our Universe and lies not very far from the entrance... so that the view of the sky in our space is almost the same for the observers near both entrances.\" This condition is never quantified. A lateral displacement of the second mouth by even a few hundred parsecs would shift the apparent positions of the Galactic center and the Magellanic Clouds by more than their angular sizes in the lensed image, and no sensitivity analysis or bound on the mouth separation is given. Without such a bound, the specific \"characteristic details\" claimed in Section IV are not a robust prediction, although the more general statement that a wormhole silhouette is not dark like a black hole shadow would survive.","section":"Section III (Fig. 5) and Section IV (Fig. 7)"},{"comment":"The quantitative results—the three multi-turn impact parameters 0.793q, 0.93q, and 0.986q and the images in Figs. 5-7—are obtained by numerical integration, but the paper gives no integration method, step size, tolerance, or convergence test, and no error estimate on these values. The mapping between the celestial sphere and the image plane (projection, pixel scale, resolution) is also not specified. Because the claimed ring structures are located at impact parameters extremely close to q, small numerical errors could alter their structure; the manuscript should describe the numerical scheme and provide validation, for example convergence with step size and comparison with analytic deflection angles.","section":"Section II, Eqs. (2)-(7); Section III, Figs. 2-3"},{"comment":"The paper states that the images in Figs. 5-7 show only distortions and do not include brightness, and that the brightness of the inner image up to 0.7 of the throat radius can be taken as constant \"with acceptable accuracy\" citing [34]. This constancy was derived for a homogeneous uniform sky, not for the temperature-fluctuation map of the CMB or the optical Milky Way image used here, and no brightness-corrected images are shown. Since the paper argues that the ring structures are \"nothing more than a distorted image of the entire Milky Way,\" the actual intensity distribution in those rings should be computed or explicitly argued to be irrelevant; otherwise the predicted observable image is not fully specified.","section":"Section IV (brightness) and reference [34]"}],"minor_comments":[{"comment":"The manuscript contains numerous typographical and language errors that should be corrected in a careful proofread, including \"considereded\" (Introduction), \"misrovawe rediation\" (Section III), \"decicts\" and \"solusion\" (Section III captions), and \"microwave\" misspelled elsewhere.","section":"Throughout"},{"comment":"The captions do not state the angular resolution or pixel count used to render the images; please provide these details so that the claimed visibility of the features can be assessed.","section":"Figures 5-7"},{"comment":"The description of the observer's line-of-sight angle (\"measured between the normal and the Galaxy plane, lies in the plane passing through the center of the Galaxy and varies from 0 to 360\") is ambiguous; a diagram or a precise definition in galactic coordinates would clarify the viewing geometry.","section":"Section III"},{"comment":"The statement that \"the width of the photon rings, starting from the second one, turns out to be smaller than the pixel size\" requires a stated pixel scale in the relevant units; otherwise the claim is not checkable.","section":"Section III"},{"comment":"The numerical algorithm and the brightness profile are taken from the authors' own prior papers; please include a self-contained summary of the integration method and brightness transfer, or an appendix, so that the present paper can be evaluated without consulting those references.","section":"References [32-34]"},{"comment":"The flux estimate assumes a throat angular size equal to the Sgr A* shadow, but the conversion from temperature map to flux (brightness temperature, bandwidth, instrumental response) is not stated; please specify this conversion to make the estimate reproducible.","section":"Section III, flux estimate"}],"recommendation":"major_revision","confidential_remarks":"The paper's central idea is interesting and potentially useful for distinguishing wormholes from black holes, but the load-bearing 'virtually identical sky' assumption and the numerical pipeline need quantitative support before publication. The scope of the journal is suitable; the manuscript would benefit from a clearer statement of the parameter range in which the claimed recognizable Milky Way features survive."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"Colleague,\n\nThe genuinely new thing here is feeding actual Planck CMB maps and a Milky Way source into the geodesic pipeline the group built in [32–34], and showing what the throat silhouette looks like with the real sky, not a uniform shell. That is a legitimate increment. The figures are evocative, the multi-turn impact parameters (0.793q, 0.93q, 0.986q) are concrete, and the basic claim—that a wormhole image would show lensed structure inside the silhouette rather than a black hole's empty shadow—is sound.\n\nThe loudest soft spot is the 'both mouths close enough that the sky looks the same' assumption. They state it in the abstract and again in Section III, but never quantify it. For the CMB the approximation is basically harmless, since the CMB is nearly isotropic on the scales involved. For the optical Milky Way it is load-bearing: move the far mouth a few hundred parsecs and the Galactic center, Magellanic Clouds, and dust lanes shift enough that the 'characteristic details' they identify in Fig. 7 would not match. The generic wormhole-vs-black-hole distinction survives, but the strong claim about recognizing our own Milky Way's features does not, unless the separation is bounded. They don't derive or discuss that bound.\n\nThe numerical pipeline is also under-described: no convergence tests, no error bars, no released code. The brightness constancy for the inner image is imported from [34], and the paper states this, but it means the flux estimate is only as good as that earlier result. None of this is fatal; it is a template paper with modest scope, and the limitations are stated in the text rather than hidden.\n\nThe prose has typos ('misrovawe', 'solusion', 'Рис.' for figures), but nothing that obscures the physics.\n\nMy take: this deserves a serious referee. The experiment of mapping the real sky through an EBMT wormhole is a clean, sensible next step after their uniform-sky papers, and the figures provide an observational template for future interferometric searches. What needs to be added in revision is a quantitative treatment of the sky-proximity assumption and a reproducibility appendix for the ray tracing. If the mouth-separation bound turns out to be implausibly tiny, the Milky Way recognition claim weakens, but the CMB image and the general idea of a non-empty wormhole interior remain worthwhile.\n\nRecommendation: send to peer review, conditional on the authors addressing the proximity bound and describing the numerics.","headline":"A legitimate increment over the group's uniform-sky wormhole work—real CMB and Milky Way maps through the throat—but the recognizable-Milky-Way signature depends on an unquantified 'second mouth nearby' assumption that needs a bound.","tokens_in":10180,"tokens_out":1963,"would_cite":false,"duration_ms":17909,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"A wormhole throat would show a lensed, ringed image of the Milky Way and the cosmic microwave background, unlike a black hole's dark shadow.","keywords":["wormhole imaging","Ellis-Bronnikov-Morris-Thorne wormhole","photon rings","gravitational lensing","cosmic microwave background","black hole shadow","ray tracing","interferometric observation"],"falsifier":"Image a compact object at the resolution proposed in the paper and compare the ring pattern with a lensed template of the local Milky Way and CMB; if the observed pattern is a smooth black-hole shadow rather than a matched lensed sky, the claimed wormhole fingerprint is falsified. A second, more model-independent check is to determine whether any two mouths are actually close: the recognizable pattern requires the far mouth to see essentially the same sky as we do.","tokens_in":9237,"feed_emoji":"🌌","tokens_out":7817,"duration_ms":73992,"temperature":0.7,"pith_summary":"This paper uses numerical ray tracing to work out what an observer would actually see when looking through the throat of an Ellis-Bronnikov-Morris-Thorne wormhole at the real sky beyond it. Its central claim is that if both mouths of the wormhole are close to our stellar neighborhood, the image inside and around the throat's silhouette contains the distant sky of the other mouth, specifically the Milky Way and the cosmic microwave background, distorted into characteristic ring structures. These rings are lensed images of our own Galaxy, not merely photon rings, and they have no counterpart in the shadow of a black hole. The authors argue that such structures give a concrete observational way to tell a wormhole from a black hole, and estimate that a throat as large as the Galactic-center black hole's shadow would be detectable as a source at roughly the hundred-microjansky level.","feed_headline":"Wormhole throat would show a ringed Milky Way, not a black hole shadow","feed_subtitle":"Lensed images of the Milky Way and cosmic microwave background could distinguish a wormhole from a black hole.","key_machinery":"The engine of the calculation is the Ellis-Bronnikov-Morris-Thorne wormhole metric, $ds^2=dt^2-\\frac{r^2}{r^2-q^2}dr^2-r^2(d\\vartheta^2+\\sin^2\\vartheta\\,d\\varphi^2)$, with throat radius $q$, together with the resulting system of six first-order differential equations for null geodesics, written in dimensionless conserved quantities and integrated numerically from the observer outward. Tracing rays backward exploits the time-reversal symmetry of the static metric and organizes the far sky by impact parameter: rays below $b=q$ pass through the throat, rays approaching $b=q$ wind multiple times, and those multiple windings map the same sky features onto the nested ring structures around the silhouette. This is the mechanism that turns the ordinary Milky Way and CMB into the claimed wormhole fingerprint.","core_discovery":"Working in the Ellis-Bronnikov-Morris-Thorne metric (a static, traversable wormhole with throat radius $q$), the authors integrate null geodesics backward from an observer at infinity to a celestial sphere in the other space. They find that rays with impact parameters $b=0.793q$, $0.93q$, and $0.986q$ wind through the throat by $180^\\circ$, $270^\\circ$, and $360^\\circ$, respectively, so one point in the far sky can be seen several times over. Applied to a realistic all-sky microwave temperature map and to the optical Milky Way, this produces, inside the wormhole silhouette, a heavily lensed version of the Galaxy with recognizable features such as the Magellanic Clouds, the Galactic center, and a dark dust band, surrounded by bright ring structures near the silhouette edge that the paper identifies as distorted images of the entire Milky Way. The authors conclude that these structures, which are absent in black-hole shadows, provide a signature enabling the wormhole interpretation to be distinguished observationally from a black hole.","pith_inferences":["Beyond the paper: the same ray-tracing pipeline applied to other sky maps, such as polarized CMB or radio synchrotron emission, would give independent pattern tests for a candidate throat.","Beyond the paper: varying the distance or orientation between the two mouths in the simulation would show how quickly the recognizable Milky Way features dissolve, quantifying how special the nearby-mouth configuration is.","Beyond the paper: for a real candidate, cross-correlating the observed ring pattern against a lensed template of the local sky would be a sharper wormhole test than the mere presence of a ring."],"forward_implications":["A candidate wormhole with nearby mouths would not look like a dark disk; its silhouette would contain recognizable, lensed structure from the other mouth.","The ring pattern hugging the throat boundary is a discriminator: black-hole shadows lack it, so a matched Milky Way and CMB ring pattern would point strongly to a wormhole.","Testing this observationally calls for very long baseline interferometry with baselines around $10^6$ to $10^7$ km, which current and planned space-ground interferometer concepts approach.","A throat as large as the shadow of the Galactic-center black hole would be detectable with a flux on the order of $100\\,\\mu$Jy at about 240 GHz, within reach of modern radio telescopes."],"supporting_citations":[{"why":"Establishes the wormhole-shadow construction method and shows how lensing shapes the outer silhouette.","marker":"[32]"},{"why":"Provides the numerical integration scheme for null geodesics in the wormhole metric used to trace rays from the observer to the far sky.","marker":"[33]"},{"why":"Gives the homogeneous-sky image and brightness profile near the throat that this paper extends to the real, structured sky.","marker":"[34]"},{"why":"Supplies the scenario of wormholes with two nearby entrances, the assumption on which the recognizable sky panorama depends.","marker":"[35]"},{"why":"Supplies the real all-sky cosmic microwave background temperature map used as the input sky.","marker":"[40]"},{"why":"Provides the black-hole shadow image that is compared and used to claim ring structures are absent in black holes.","marker":"[46]"}],"fun_headline_variants":["Wormhole view of Milky Way: rings reveal throat, no black hole shadow","Wormhole lensing: Milky Way rings, not a black hole shadow","See the Milky Way through a wormhole: rings betray the throat","Milky Way lensed by wormhole: ringed image, no shadow"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The entire identification scheme assumes the two wormhole mouths are close enough that the sky near the far mouth is virtually identical to the sky near the Solar System; if that fails, the claimed Milky Way and CMB patterns would be replaced by an unrecognizable sky.","fun_headline_variants_meta":{"raw":{"variants":["Wormhole view of Milky Way: rings reveal throat, no black hole shadow","Wormhole lensing: Milky Way rings, not a black hole shadow","See the Milky Way through a wormhole: rings betray the throat","Milky Way lensed by wormhole: ringed image, no shadow"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000458,"raw_usage":{"total_tokens":2269,"prompt_tokens":890,"completion_tokens":1379,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":506,"completion_tokens_details":{"reasoning_tokens":1297}},"tokens_in":506,"tokens_out":1379,"duration_ms":10253,"temperature":1.0,"reasoning_tokens":1297,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-11T19:36:04.777411+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Image a compact object at the resolution proposed in the paper and compare the ring pattern with a lensed template of the local Milky Way and CMB; if the observed pattern is a smooth black-hole shadow rather than a matched lensed sky, the claimed wormhole fingerprint is falsified. A second, more model-independent check is to determine whether any two mouths are actually close: the recognizable pattern requires the far mouth to see essentially the same sky as we do.","supporting_citations":[{"cited_title":"Novel regular black holes: geometry, source and shadow","cited_arxiv_id":"2308.12155","evidence_quote":"Establishes the wormhole-shadow construction method and shows how lensing shapes the outer silhouette."},{"cited_title":"Silhouettes of wormholes traversed for radiation","cited_arxiv_id":"2205.10168","evidence_quote":"Gives the homogeneous-sky image and brightness profile near the throat that this paper extends to the real, structured sky."},{"cited_title":"Uniform sky glow (CMB) observed through the throat of a wormhole","cited_arxiv_id":"2305.18041","evidence_quote":"Supplies the scenario of wormholes with two nearby entrances, the assumption on which the recognizable sky panorama depends."},{"cited_title":"Bugaev, I","cited_arxiv_id":null,"evidence_quote":"Supplies the real all-sky cosmic microwave background temperature map used as the input sky."},{"cited_title":"Practical study of optical stellar interferometry","cited_arxiv_id":"2302.11925","evidence_quote":"Provides the black-hole shadow image that is compared and used to claim ring structures are absent in black holes."}],"review_version":1}