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UFOs: how astronomers are searching the sky for alien probes near Earth

Beatriz Villarroel, Stockholm University
There has been increased interest in unidentified flying objects (UFOs) ever since the Pentagon’s 2021 report revealed what appears to be anomalous objects in US airspace, dubbed unidentified aerial phenomena (UAP). Fast forward to 2023, and Nasa has already formed a panel to investigate the reports and appointed a director for UAP research.
A newly founded Pentagon desk has also released footage of mysterious metallic orbs. What is perhaps most remarkable is that David Grusch, a former intelligence officer, testified under oath before the US Congress, stating that he had interviewed around 40 people involved in secret programmes dealing with crashed UFOs.
I am interested in searching the sky for alien, physical objects which may one day tell us whether we are alone in the galaxy. Consider this: within our own Milky Way galaxy, there are 40 billion Earth-sized, potentially habitable planets.
Human ingenuity has enabled us to engineer and launch probes like Voyager and Pioneer, capable of reaching the closest stars. We’ve initiated efforts such as the Breakthrough Starshot programme which aims to reach nearby star Alpha Centauri in just a few decades by exploring innovative propulsion methods. Sending a probe may be more economical than sending out radio or laser communication if there is no need to hurry.
If humans can send a probe to another star, why couldn’t another civilisation send a probe to our Solar System? Such a probe could make it to the main asteroid belt and lurk on an asteroid.
Or, it could make its way to the Earth, entering our atmosphere. If observed, it would be branded as a “UFO”. A civilisation capable of producing and sending probes could dispatch millions of them on exploratory missions throughout our galaxy.
Some may argue that such probes could only exist if they adhere to the laws of physics and engineering as we understand them today. However, humanity is a relatively young civilisation, and our knowledge is constantly evolving.
While humans have dreamt of flying for millennia as we gazed at the skies, it has only been 120 years since the Wright brothers achieved the first powered flight. That’s about as long ago as Albert Einstein published his theory of special relativity.
Is it really so difficult to imagine that a civilisation that is hundreds of thousands years older than ours might have learned more about the laws of physics or developed a few more engineering tricks?
If a civilisation were to evolve into artificial intelligence (AI), it might survive for millions of years. This could mean it would casually regard slow to a neighbouring star as nothing more than a leisurely stroll.
That said, few astronomers felt impressed by the US Navy videos or government reports. We need significantly better evidence and data than what has been presented so far.
Unveiling UFOs
How can we test whether there are extra terrestrial probes near Earth, and whether they can be tied to the possible UFO phenomenon? There are many options. Analysing materials from potentially crashed UFOs could give irrefutable proof. This would require state-of-the-art techniques to determine if these wrecks exhibit exotic or distinctly different characteristics of manufacture.
Obtaining such exotic samples, if they indeed exist, may prove challenging – they are rumoured to be in the hands of private companies. But newly proposed legislation might offer a solution to that problem in United States by mandating that all artificial materials from any non-human intelligence be surrendered to the US government.
In the projects I lead, we are searching for artificial non-human objects by looking for short light flashes in the night sky. Short flashes typically occur when a flat, highly reflective surface — such as a mirror or glass — reflects sunlight. It could, however, also result from an artificial object emitting its own internal light.
Such short light flashes sometimes repeat and follow a straight line as the object tumbles in space during its orbit around the Earth. This is why satellites often appear as repeating light flashes in images.
Historical photographic plates taken before the launch of Sputnik 1 in 1957 have revealed the presence of nine light sources (transients) that appear and vanish within an hour in a small image, defying astronomical explanations. In some cases, the transient light sources are even aligned, just like when short flashes come from moving objects.
The most recent finding of this kind shows three bright stars in an image dated July 19, 1952 (coincidentally, the same time as the famous Washington UFO flyovers). The three stars were never seen again.
Searching for alien probes in the modern night sky presents a serious but necessary challenge. A new research programme, known as ExoProbe, searches for short light flashes from potential alien objects with the help of multiple telescopes.
To verify the authenticity of each flash, it must be observed in at least two different telescopes. Since these telescopes are separated by hundreds of kilometres, any light flash caused by an object within the inner Solar System enables the measurement of parallax — the apparent shift in the position of an object as seen from two different points — and the calculation of the distance to the object.
The ExoProbe project also uses its own methods to filter out light flashes from the millions of space debris fragments and thousands of satellites cluttering the sky. By adding a telescope taking real-time spectra (the wavelength distributions of the light) of the objects in a wide field, you can analyse the transients before they vanish into nothingness.
Finally, increasing the number of telescopes further enhances accuracy in measuring parallax and determining the actual three dimensional location of the object. Ultimately, the goal is to identify any potential alien object and bring it back to Earth for further study.
Some 60 years of searches for extraterrestrial civilisations in the radio frequencies have yielded no candidates whatsoever. We find ourselves at a moment in time when new paths must be explored. That means we can finally focus our attention closer to home. Regardless of the outcome, this journey is certainly an homage to our insatiable curiosity.
Beatriz Villarroel, Assistant professor of Physics, Stockholm University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Kingman UFO Crash of 1953: Fact, Fiction, or Cold War Legend?
Explore the mystery of the 1953 Kingman UFO crash. From rumors of wreckage taken to Area 51 to claims of an alien named “J-Rod,” this Cold War story remains one of UFO history’s most debated legends.
Last Updated on October 11, 2025 by Daily News Staff
In the spring of 1953, the quiet desert town of Kingman, Arizona, became the center of one of UFO history’s most debated mysteries. At the height of the Cold War, witnesses claimed that something unusual fell from the desert sky. What followed has fueled speculation for decades—connecting the small Arizona town to America’s most secretive base, Area 51.
The Crash in the Desert
According to reports, an unidentified craft was said to have crashed near Kingman in May 1953. Local accounts suggested that the U.S. military quickly secured the site, transporting the wreckage under tight secrecy. For years, however, this alleged event remained little more than rumor, blending into the larger backdrop of Cold War fears and secrecy.
Area 51 and the Alleged Cover-Up
The story took on new life when claims surfaced that the wreckage had been moved to Area 51, the highly restricted military base in Nevada long associated with UFO lore. At the time, the base itself was shrouded in secrecy, making it fertile ground for speculation about what the government might be hiding.
Bill Uhouse and “J-Rod”
The most astonishing claims didn’t appear until 1998, when retired military engineer Bill Uhouse stepped forward. Uhouse alleged that the U.S. government not only recovered alien technology but also encountered a living extraterrestrial being. He referred to this being as “J-Rod” and claimed it worked alongside American scientists to unlock the secrets of advanced propulsion systems.
If true, this collaboration would mark one of the most extraordinary events in modern history—bridging human science with extraterrestrial knowledge. Skeptics, however, point out the lack of verifiable evidence and suggest the story may be a product of Cold War imagination.
A Mystery That Endures
Like many UFO stories from the mid-20th century, the Kingman crash remains steeped in uncertainty. Did a spacecraft really come down in the Arizona desert? Was J-Rod a real extraterrestrial presence, or simply another chapter in the long saga of Cold War secrecy and speculation?
What is certain is that the Kingman UFO crash continues to spark curiosity, debate, and fascination—reminding us of how the lines between history, myth, and mystery can blur.
🔎 Related Topics
- The Roswell Incident of 1947 – History.com
- Inside Area 51 – National Geographic
- Cold War UFO Sightings – CIA Declassified Documents
- The Kingman UFO Crash – A Discreet Downed UFO That Slipped Under The Radar?
- Arizona UFO Crash – UFO Casebook
The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/
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Entertainment
Fire in the Sky vs. Travis Walton’s Testimony: What Really Happened?
Discover the truth behind Fire in the Sky vs. Travis Walton’s real testimony. Learn what really happened during the 1975 UFO abduction and what Hollywood changed for the movie.
Last Updated on October 6, 2025 by Daily News Staff
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When Travis Walton vanished from an Arizona forest in 1975, the world was stunned. His story of being struck by a beam of light from a UFO and later reappearing after five days became one of the most famous alien abduction cases in history. Nearly two decades later, Hollywood brought his story to the big screen in the 1993 film Fire in the Sky.
But how much of the movie matched Walton’s actual testimony?
The Real Testimony: Travis Walton’s Experience
In Walton’s own words, detailed in his book The Walton Experience:
He and six coworkers saw a glowing disc-shaped UFO while driving through the Apache-Sitgreaves National Forest. Walton approached and was struck by a beam of light, vanishing before their eyes. He later recalled waking inside a clean, metallic room. He first encountered short, large-eyed beings — similar to the classic “greys.” After panicking, he was met by taller, human-like beings who guided him silently through the craft. He blacked out again and awoke days later on the roadside as the UFO departed.
Walton’s description was eerie and confusing, but not grotesque.
The Hollywood Version: Fire in the Sky (1993)
The film’s abduction sequence became infamous for its nightmarish visuals:
Walton awakens in a slimy cocoon-like environment, unlike the clean metallic room he described. He discovers corpses wrapped in membranes — a pure Hollywood invention. The aliens are depicted as grotesque, insect-like creatures rather than the greys or human-like beings Walton reported. Walton is violently restrained on a table while aliens perform invasive procedures, including a chilling needle-to-the-eye scene.
The movie leaned heavily into horror, turning Walton’s mysterious account into a terrifying cinematic ordeal.
What Was Real vs. Fiction
Accurate in the Film:
Walton struck by a beam of light and vanishing. His coworkers sticking to their story and passing polygraphs. Walton reappearing days later, shaken and disoriented.
Invented for Hollywood:
Cocoon-like interiors and human corpses. Alien torture and invasive experiments. Insect-like, monstrous alien designs. The extreme horror atmosphere.
Walton’s View
Travis Walton himself has stated that while Fire in the Sky captured the drama of his disappearance, it distorted the abduction itself. He called the film’s alien sequence “Hollywood horror” and emphasized that his real experience, though frightening, was not sadistic or grotesque.
The Lasting Legacy
Today, the Travis Walton UFO incident remains one of the most debated abduction cases ever. Fire in the Sky introduced the story to millions but also blurred the line between fact and fiction. For Walton, the truth was strange enough — and far less like a nightmare than Hollywood imagined.
🔗 Related External Reading
Skeptical Inquirer: The Travis Walton Abduction Revisited (searchable article, skeptical perspective)
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