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Within Alpine UFO Files

How Trentino Alto Adige's UFO Story Developed Over Time

A timeline links scattered reports, official totals and memorable local cases without turning isolated events into a false regional flap.

82 sources 3 graphics

On this page

  • The post 1978 reporting system
  • Sightings and records from the 1990 s
  • Modern cases and changing explanations
Preview for How Trentino Alto Adige's UFO Story Developed Over Time

Introduction

Trentino-Alto Adige’s UFO history developed through brief, uneven bursts rather than one sustained regional “flap”. The clearest official sequence begins in 1992 and peaks modestly between 1994 and 1996, when reports were logged at places including Castel Tesino, Rovereto and nearby mountain passes. Later episodes around Trento, Bolzano and the Sciliar massif attracted more immediate press attention but rarely produced better evidence.

Overview image for Timeline

That pattern matters because a cluster of dates can look more dramatic than the underlying records justify. Some entries describe striking shapes or movements, yet most rest on a single witness report, with no published radar track, calibrated photograph or independent reconstruction. Others belong to a newer class of sighting in which satellites, sky lanterns, meteors and rocket exhaust can be checked against digital data. The regional timeline therefore shows not a growing body of proof, but a changing relationship between unusual observations, reporting systems and possible explanations.

The post-1978 reporting system

Italy’s modern official record was shaped by the nationwide sighting wave of 1978. Prime Minister Giulio Andreotti assigned the Italian Air Force responsibility for collecting, checking and monitoring UFO reports. The current procedure asks a witness to complete a standard form and submit it through the Carabinieri, after which the Air Force looks for possible links to aircraft, other human activity or natural phenomena. The stated purpose is flight and national security, not the investigation of extraterrestrial visitors.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare OVNIQuesta azione consente all’Aeronautica Militare di avviare un’indagine tecnica per identificare l’esistenza di una correlazione con event…

This distinction is essential when reading the published files. An event catalogued as an unidentified flying object is one for which the available checks did not establish a technical or natural identification. It is not an official finding that the object was an extraordinary craft. A sparse report may remain unidentified simply because the original information was insufficient.

Private archives fill some of the gaps. Alessandro Cortellazzi, a founding member of the Italian Centre for UFO Studies, has maintained a catalogue of sightings from Trentino-Alto Adige and South Tyrol since 1975. Such local collections preserve cases that never reached the military system, but their evidential value depends on access to the original testimony, photographs, correspondence and later analysis.[CISU]cisu.orgAlessandro CortellazziAlessandro Cortellazzi - CISUMarch 2, 2023 — Dal 1975 cura l'archivio e il catalogo regionale degli avvistamenti del Trentino Alto…Published: March 2, 2023

Sightings and records from the 1990s

The Air Force’s regional table lists eight Trentino-Alto Adige reports between 1991 and 2000: one in 1992, two in 1994, two in 1995, two in 1996 and one in 1997. There were no listed regional cases in 1991, 1993 or from 1998 to 2000. Italy as a whole recorded 112 entries during the decade, so the region supplied about seven per cent of the published national total. The figures show a short mid-decade concentration, but not a large regional wave.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare Presentazione standard di Power PointAeronautica Militare Presentazione standard di Power Point

1992: a fast light over Trento

The first regional entry in the decade occurred over Trento at about 10.40 pm on 17 January 1992. A private citizen described a circular, dazzling light moving at high speed from west to east under a clear sky with light wind. The Air Force record says that, after reviewing the information in its archive, the event was catalogued as unidentified.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare

The report is useful as a starting point because it illustrates both the strength and weakness of the official archive. It provides a date, direction, weather description and broad appearance, but no duration, angular size, exact observation point or published comparison with aircraft, meteors or satellites. “Unidentified” is therefore an accurate administrative description, while the evidence is too limited to support a stronger conclusion.

Timeline illustration 1

1994: two very different events on one day

The most interesting chronological coincidence came on 20 November 1994. At 5.30 am in Castel Tesino, a civilian and a member of the Italian Army reported an orange, triangular form with a luminous trail. It was described as moving vertically at low speed at an estimated altitude of roughly 1,600 metres in clear conditions.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare

At approximately 8.30 pm the same day, a witness at Colsanto near Rovereto reported a stationary luminous body showing white, red and green colours. The record gives no altitude or weather information. It too was catalogued as unidentified after an archival review.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare

The shared date should not be mistaken for proof that the observations were connected. They were separated by about fifteen hours and differed in location, form, colour and reported behaviour. One resembled a descending or vertically moving object with a trail; the other resembled a fixed, multicoloured light. Without matching trajectories, timing or instrumental confirmation, they are better treated as separate entries than as a coordinated regional event.

The Castel Tesino report nevertheless has slightly greater evidential interest because two witnesses are identified by category, including a serving soldier. Even here, occupational status does not solve the central problems of estimating distance and altitude against a mountain sky. The published file supplies no witness statements showing whether both observers independently described the same triangular form.

1995–96: the statistical high point

The regional table records two cases in 1995, although the summary figure by itself provides little help in assessing their quality. That gap demonstrates why annual totals cannot serve as a measure of unexplained activity: two detailed, multi-witness incidents and two brief reports would count equally.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare Presentazione standard di Power PointAeronautica Militare Presentazione standard di Power Point

The two 1996 entries form a more coherent local sequence. At about 11.30 pm on 2 May, a witness near Monte Lenzima outside Rovereto reported a flat, stationary white light beneath a cloudy sky. At approximately the same time on the following night, a spherical yellow light was reported near Monte Stivo, moving slowly with a variable path, again under cloud. Both were entered as unidentified.[Aeronautica Militare]aeronautica.difesa.itAeronautica MilitareAeronautica Militare

Because the observations occurred on consecutive nights in the same broad Rovereto area, they constitute the closest thing in the official decade to a small local cluster. Yet their descriptions do not establish a common object. The first light was flat, white and stationary; the second was spherical, yellow and moving. Cloud may also have complicated estimates of form and movement. Searchlights, aircraft seen intermittently through cloud, lights on distant terrain and bright astronomical objects distorted by atmospheric conditions are all categories that would need to be tested before calling the pair a genuine flap.

1997: the Folgaria cylinder

The final regional entry of the decade was reported in daylight at about 11 am on 2 April 1997 near Passo della Borcola at Folgaria. Several private citizens described a light metallic cylinder moving slowly downwards at an estimated altitude of about 1,200 metres under a clear sky. The event remained catalogued as unidentified in the released archive.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare

As a daylight, multi-witness report, it is potentially more informative than a distant nocturnal light. Even so, the public record contains no drawings, duration, angular measurements, photographs or explanation of how the altitude was calculated. A balloon, airborne debris or conventional aircraft seen at an unfamiliar angle cannot be excluded from the summary alone. The case remains unresolved because the documentation is incomplete, not because competing explanations were demonstrably eliminated.

Taken together, the 1990s sequence is concentrated in Trentino rather than the Bolzano province represented by the region’s name. That may reflect where reports happened, where investigators were active or which incidents entered the official channel. It should not automatically be read as evidence that one province experienced more unusual aerial phenomena.

Timeline illustration 2

Local reporting returns after 2000

Official statistics no longer provide the only visible timeline after the turn of the century. Local radio, newspapers and online video made reports public almost immediately, often before any formal investigation had begun. The resulting stories were richer in witness detail but also more vulnerable to repetition, speculation and loss of technical context.

In November 2008, a nurse and a companion said they watched five pale-yellow spheres over southern Trento for roughly half an hour. They described a geometric formation, apparent synchronous manoeuvres and smaller dark points within it, and recorded a short mobile-phone video. The account reached the public through Radio Dolomiti and the local press rather than through a published Air Force case file.[l'Adige]ladige.itho visto gli ufo e ho girato un breve filmato qgk758pyl'Adige"Ho visto gli ufo e ho girato un breve filmato"6 Nov 2008 — Un'infermiera trentina ieri mattina ha raccontato nello spazio condott…

The long duration and two witnesses make the episode memorable, but the surviving press account does not establish distance, scale or physical structure. A geometric arrangement can be created by separate balloons, aircraft or objects at different distances that happen to align from one viewpoint. The video’s usefulness would depend on original resolution, camera movement, reference points and metadata, none of which is supplied in the article.

A second press-led episode occurred shortly after midnight in April 2011 over Oltrisarco, Bolzano. Residents described two groups of six red spherical lights moving in formation and making circles or triangles for about ten minutes. Police requested the witnesses’ photographs. Bolzano airport said that no anomalous radar return or unexplained air movement had been recorded.[Alto Adige]altoadige.itoggetti luminosi nel cielo ufo sopra oltrisarco fdbkp50ooggetti luminosi nel cielo ufo sopra oltrisarco fdbkp50o

The absence of an airport radar contact weakens interpretations involving a substantial nearby aircraft, although it does not prove that nothing physical was present: small, slow or distant objects may not produce a useful return. Red or orange lights moving together for several minutes also match the broad appearance of illuminated sky lanterns, which generated numerous Italian UFO reports around the same period. Comparable 2011 incidents elsewhere were traced or plausibly attributed to paper lanterns, showing why this explanation must be examined even though it was not proved for the Bolzano lights.[blitzquotidiano.it]archivio.blitzquotidiano.itit Pordenone, i tre ufo avvistati erano delle lanterne cinesi: mistero risolto?it Pordenone, i tre ufo avvistati erano delle lanterne cinesi: mistero risolto?Published: April 27, 2011

The episode also illustrates the gap between press and official records. The Air Force’s published 2011 file lists reports from several Italian regions but does not include the Oltrisarco event. Newspaper coverage and a police contact therefore do not necessarily mean that an incident completed the formal military reporting process.[Aeronautica Militare]aeronautica.difesa.itAeronautica Militare

The Sciliar case and the aerospace dispute

One of the region’s best-known modern narratives concerns a large white light seen from Aica di Fiè near the Sciliar massif, reportedly around 2010 and recounted publicly in 2012. Actress Monica Trettel said that four people watched the silent light apparently hanging over the Bolzano basin for about ten minutes. She described it as departing rapidly in a zigzag direction towards Renon. She also reported that the Collepietra astronomical observatory had seen the phenomenon and received other calls, while a priest in the Braies valley had observed a similar light shortly beforehand.[Franz Magazine]franzmagazine.commonica trettel e lincontro ravvicinato con gli ufo sullo sciliarmonica trettel e lincontro ravvicinato con gli ufo sullo sciliar

A reported explanation linked the luminous halo to fuel released during the launch of a military weather satellite from Vandenberg, California. Trettel rejected that interpretation because, from the witnesses’ perspective, the light appeared low, stationary and later capable of controlled movement.[Franz Magazine]franzmagazine.commonica trettel e lincontro ravvicinato con gli ufo sullo sciliarmonica trettel e lincontro ravvicinato con gli ufo sullo sciliar

The disagreement captures a recurring problem in Alpine cases. A high-altitude plume illuminated by the Sun can look immense, close and almost motionless because there are no reliable distance cues. Changes in brightness, wind-driven distortion and the observer’s shifting viewpoint can then give an impression of manoeuvring. Conversely, merely naming a launch is not a complete explanation: a persuasive identification would require an exact sighting date, launch and fuel-release times, calculated visibility from South Tyrol and agreement between the predicted and reported direction of travel.

Later developments therefore weakened the case as proof of an extraordinary vehicle without fully resolving the historical report. Rocket exhaust and fuel dumps are now well documented sources of spectacular spirals, clouds and luminous formations over Europe. A blue spiral widely seen over northern Italy and other European countries in March 2025, for example, was traced to a Falcon 9 operation whose high-altitude gases became visible under favourable lighting.[RaiNews]rainews.itRai News La spirale luminosa in cielo azzurra avvistata nei cieli e leRai News La spirale luminosa in cielo azzurra avvistata nei cieli e lePublished: March 25, 2025

That modern comparison makes the aerospace explanation for the Sciliar light more credible in principle. It does not retroactively prove that the witnesses misperceived a launch plume, because the original event’s basic timing and observational geometry have not been published in enough detail for an independent reconstruction.

Timeline illustration 3

Modern cases and changing explanations

The latest phase of the timeline is defined less by a distinctive regional wave than by a transformation in what people see and how quickly it can be checked. Smartphone cameras create more footage, but zoom, automatic exposure and image stabilisation can turn distant points into blurred discs or apparently erratic objects. Social media then groups unrelated observations together before flight paths or astronomical data are examined.

At the same time, the night sky contains more conspicuous human-made objects. Newly launched Starlink satellites may cross the sky as an evenly spaced “train” of lights, a formation unfamiliar to observers who expect satellites to appear singly. Rocket stages can create expanding clouds, cones or spirals, while sky lanterns produce slow orange lights that separate, regroup and disappear as their flames go out.[RaiNews]rainews.itRai News Un trenino di punti luminosi avvistato nel cielo di BergamoRai News Un trenino di punti luminosi avvistato nel cielo di BergamoPublished: August 22, 2022

These explanations change the interpretation of earlier regional reports in two ways. First, they provide realistic models for formations and apparently silent lights that once seemed especially exotic. Secondly, they demonstrate the importance of rapid investigation. Satellite positions, launch records, aircraft tracking and meteor observations can often be checked soon after an event, but reconstructing them years later becomes difficult if the exact time and viewing direction were never recorded.

They do not explain every report automatically. The proper comparison is case by case:

  • A straight line of evenly spaced white lights strongly favours a satellite train.
  • Several slow orange-red lights drifting together favour lanterns or balloons, particularly near celebrations.
  • A brilliant object with a brief trail and rapid descent favours a meteor or re-entering debris.
  • A large diffuse cloud, spiral or halo seen across a wide area favours a rocket plume or fuel release.
  • A report of prolonged structured movement requires original footage, fixed landmarks and independent viewpoints before claims of unusual performance can be evaluated.

The same caution applies to radar. The Oltrisarco report gained attention partly because Bolzano airport found no anomaly, but a negative radar check is not confirmation of an extraordinary object. Conversely, a verified radar track would still need to be matched with weather, aircraft and sensor-performance data before it became strong evidence.

A timeline of clusters, not a regional flap

The most defensible regional chronology is therefore a modest one:

  • 1978: Italy’s national sighting wave leads to the Air Force reporting and investigation system.
  • 1992: the first Trentino-Alto Adige entry of the published 1991–2000 table records a fast, dazzling light over Trento.
  • 1994: separate reports at Castel Tesino and Colsanto near Rovereto occur on the same date, but lack evidence of a common cause.
  • 1995–96: official numbers reach their regional high point, including two consecutive-night reports near Rovereto in May 1996.
  • 1997: a daylight cylindrical object is reported by several witnesses near Folgaria.
  • 1998–2000: no regional entries appear in the Air Force’s decade table.
  • 2008: a filmed formation over Trento becomes a local radio and newspaper story.
  • 2010–12: the Sciliar light enters regional UFO culture, accompanied by a disputed satellite-launch explanation.
  • 2011: grouped red lights over Bolzano attract witnesses and police interest, but no airport radar anomaly and no corresponding entry in the published Air Force file.
  • The satellite era: launch plumes, orbital formations and improved tracking increasingly provide testable alternatives to extraordinary interpretations.

This sequence does not reveal a steadily intensifying phenomenon or a single Alpine hotspot producing the same type of object. It shows intermittent reports with changing shapes, colours, settings and evidential quality. The official mid-1990s cluster is real as a reporting pattern, but too small and heterogeneous to establish a physical wave. Later media cases are more vivid, yet often no better documented.

Trentino-Alto Adige’s UFO story is consequently most valuable as a study in how unexplained sightings are preserved and reinterpreted. A few cases remain unresolved in the limited sense that no cause was demonstrated. Several are weak because essential observational details are absent. Others have become less mysterious as launches, satellites, lanterns and atmospheric effects have grown easier to recognise. The timeline becomes clearer not by forcing the reports into one narrative, but by keeping distinct the date of the observation, the date it was publicised, the quality of the investigation and the explanation that later evidence can genuinely support.

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Endnotes

1. Source: cisu.org
Title: Alessandro Cortellazzi
Link:https://www.cisu.org/alessandro-cortellazzi/

Source snippet

Alessandro Cortellazzi - CISUMarch 2, 2023 — Dal 1975 cura l'archivio e il catalogo regionale degli avvistamenti del Trentino Alto...

Published: March 2, 2023

2. Source: cisu.org
Title: Rappresentanti locali
Link:https://www.cisu.org/chi-siamo/rappresentanti-locali-del-cisu/

Source snippet

Alessandro Cortellazzi – via Monte Corno, 3 – 38122... 5.000 avvistamenti UFO in Europa in un anno — e nessun sistema comunitario di...

3. Source: aeronautica.difesa.it
Title: Aeronautica Militare
Link:https://www.aeronautica.difesa.it/wp-content/uploads/2023/05/Archivio_OVNI_periodo1991-2000.pdf

4. Source: archivio.blitzquotidiano.it
Title: it Pordenone, i tre ufo avvistati erano delle lanterne cinesi: mistero risolto?
Link:https://archivio.blitzquotidiano.it/video/pordenone-ufo-lanterne-cinesi-836108/
Published: April 27, 2011

5. Source: aeronautica.difesa.it
Title: Aeronautica Militare
Link:https://www.aeronautica.difesa.it/wp-content/uploads/2022/11/OVNI-2011.pdf

6. Source: rainews.it
Title: Rai News La spirale luminosa in cielo azzurra avvistata nei cieli e le
Link:https://www.rainews.it/articoli/2025/03/la-spirale-azzurra-misteriosa-avvistata-nei-cieli-e-le-suggestioni-sugli-ufo-avvistamenti-ed-il-dibattito-sullesistenza-di-vita-aliena-bb5b5b69-8d50-415d-997c-3f71a9a5d1eb.html
Published: March 25, 2025

7. Source: rainews.it
Title: Rai News Un trenino di punti luminosi avvistato nel cielo di Bergamo
Link:https://www.rainews.it/video/2022/08/un-trenino-di-punti-luminosi-avvistato-nel-cielo-di-bergamo-sono-i-satelliti-starlink-di-elon-musk-9f6d34eb-225d-4274-9ef4-e2451854a242.html
Published: August 22, 2022

8. Source: rainews.it
Link:https://www.rainews.it/articoli/2024/06/loggetto-volante-a-grande-velocita-lo-strano-avvistamento-nei-cieli-di-molte-parti-di-italia-il-mistero-a82d0e55-88d3-413c-8aa6-a3af458fcd90.html

9. Source: rainews.it
Link:https://www.rainews.it/video/2024/06/strano-avvistamento-nei-cieli-di-molte-parti-di-italia-i-video-in-rete-fbc9bd9c-dea6-498b-9a94-6fc71ea00e82.html

10. Source: aeronautica.difesa.it
Title: Aeronautica Militare OVNI
Link:https://www.aeronautica.difesa.it/ovni/

Source snippet

Questa azione consente all’Aeronautica Militare di avviare un’indagine tecnica per identificare l’esistenza di una correlazione con event...

11. Source: aeronautica.difesa.it
Title: Aeronautica Militare OVNI
Link:https://www.aeronautica.difesa.it/en/ovni/

Source snippet

Aeronautica MilitareOVNI - Aeronautica Militare...

12. Source: aeronautica.difesa.it
Link:https://www.aeronautica.difesa.it/wp-content/uploads/2022/11/ModuloUFO.pdf

Source snippet

ISTRUZIONI: Il modulo seguente deve essere utilizzato per la segnalazione dell’avvistamento di un O.V.N.I..... generalità e consegnato a...

13. Source: aeronautica.difesa.it
Title: Aeronautica Militare Presentazione standard di Power Point
Link:https://www.aeronautica.difesa.it/wp-content/uploads/2023/05/INT.Dperiodo1991-2000.pdf

14. Source: ladige.it
Title: ho visto gli ufo e ho girato un breve filmato qgk758py
Link:https://www.ladige.it/cronaca/ho-visto-gli-ufo-e-ho-girato-un-breve-filmato-qgk758py

Source snippet

l'Adige"Ho visto gli ufo e ho girato un breve filmato"6 Nov 2008 — Un'infermiera trentina ieri mattina ha raccontato nello spazio condott...

15. Source: altoadige.it
Title: oggetti luminosi nel cielo ufo sopra oltrisarco fdbkp50o
Link:https://www.altoadige.it/cronaca/bolzano/oggetti-luminosi-nel-cielo-ufo-sopra-oltrisarco-fdbkp50o

16. Source: altoadige.it
Title: Alto Adige«Oggetti luminosi nel cielo»: ufo sopra Oltrisarco?
Link:https://www.altoadige.it/cronaca/bolzano/oggetti-luminosi-nel-cielo-ufo-sopra-oltrisarco-1.26989

17. Source: ilcittadino.it
Title: strani avvistamenti nei cieli della bassa o 3076 96
Link:https://www.ilcittadino.it/stories/basso_lodigiano/strani-avvistamenti-nei-cieli-della-bassa-o_3076_96/

18. Source: franzmagazine.com
Title: monica trettel e lincontro ravvicinato con gli ufo sullo sciliar
Link:https://franzmagazine.com/2012/01/26/monica-trettel-e-lincontro-ravvicinato-con-gli-ufo-sullo-sciliar

19. Source: aeronautica.difesa.it
Title: it Atti Generali
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Published: July 21, 2026

20. Source: aeronautica.difesa.it
Title: it Attività e procedimenti​
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Published: July 17, 2026

21. Source: aeronautica.difesa.it
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Published: October 5, 2023

22. Source: aeronautica.difesa.it
Title: it Organizzazione (amministrazione trasparente)
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23. Source: aeronautica.difesa.it
Title: it Trento: inaugurata la mostra sui cento anni dell’Aeronautica Militare
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24. Source: aeronautica.difesa.it
Title: it OVN I
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Published: January 12, 2023

25. Source: aeronautica.difesa.it
Title: it ASSOCIAZION E ARMA AERONAUTICA, L’INCONTRO CON L’A.M. AL 51° STORMO
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Published: September 24, 2019

26. Source: aeronautica.difesa.it
Title: it GL I ALLIEVI DELLA DOUHET A LEZIONE DI SOPRAVVIVENZA
Link:https://www.aeronautica.difesa.it/news/gli-allievi-della-douhet-a-lezione-di-sopravvivenza/
Published: January 19, 2019

27. Source: altoadige.it
Title: www.altoadige.it Oltrisarco, il Comune posa 52 lampioni «high tech»
Link:https://www.altoadige.it/cronaca/bolzano/oltrisarco-il-comune-posa-52-lampioni-high-tech-1.1658543
Published: June 24, 2018

28. Source: aeronautica.difesa.it
Title: it MISSION E FUTURA: AL VIA IL POST FLIGHT TOUR
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Published: October 5, 2015

29. Source: aeronautica.difesa.it
Title: it L’ A.M. PARTECIPA AL MEETING SUGLI OVNI
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Published: September 26, 2015

30. Source: aeronautica.difesa.it
Title: conclusa a rivolto lesercitazione high blaze 2014
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31. Source: aeronautica.difesa.it
Title: it CONCLUS A “UNIFIED PROTECTOR” PER IL 32° STORMO
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Published: November 10, 2011

32. Source: aeronautica.difesa.it
Title: conclusa lesercitazione sater 02 2011
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Published: July 4, 2011

33. Source: aeronautica.difesa.it
Title: conclusa ex high blaze 2011 della rnaf
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34. Source: aeronautica.difesa.it
Title: it CATALOG O PUBBLICAZIONI UFFICIO STORICO
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35. Source: altoadige.it
Title: www.altoadige.it”Quei fenomeni in cielo? Fulmini globulari”
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36. Source: aeronautica.difesa.it
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37. Source: aeronautica.difesa.it
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39. Source: aeronautica.difesa.it
Title: it OVN I Archives
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52. Source: franzmagazine.com
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53. Source: franzmagazine.com
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Additional References

55. Source: montagna.tv
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Source snippet

Secondo quanto raccontano le due donne, improvvisamente 5 corpi luminosi sarebbero comparse nei cieli di Trento: sfere luminose di colore...

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57. Source: bufale.net
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Published: September 18, 2015

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Published: September 13, 1991