Fact Checker
Debunking space weather misinformation with live data and expert analysis. Every verdict is backed by NOAA, NASA, and JPL sources.
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Seen a claim about space weather, space exploration, astronauts, or UAPs? Paste it here and our AI will fact-check it against live data, official sources, and government records.
An unexplained black line momentarily appeared across the moon when viewing it from Earth this week
No credible astronomical record, space agency report, or peer-reviewed observation supports the appearance of an unexplained black line across the lunar disc this week or at any recent point in time. When dark lines crossing the Moon are reported by amateur observers, astronomers and optics experts consistently identify mundane foreground causes: high-altitude contrails, passing aircraft, low-Earth-orbit satellites, or geological surface features such as the straight fault scarp Rupes Recta, none of which qualify as unexplained phenomena. Global networks of lunar orbiters, professional observatories, and space monitoring agencies operate continuously and have logged no anomalous events of this nature — a claim of this magnitude, were it real, would be immediately and universally corroborated. The assertion therefore rests entirely on the hallmarks of misinformation: vague temporal framing ("this week"), the absence of verifiable documentation, and the near-certain likelihood that any observed effect has a straightforward optical or atmospheric explanation.
12,000 years ago there was a massive catastrophic event on Earth and some humans left in spaceships they built, now they come back and check up on us every now and then
Roughly 12,000 years ago, significant geological and climatic upheaval did occur — the Younger Dryas period is well-documented — but no peer-reviewed scientific literature, declassified intelligence records, or official government reporting supports the existence of spacefaring technology among ancient humans at any point in prehistory. AARO's 2024 historical review of U.S. government involvement in UAP matters found zero credible evidence linking unidentified phenomena to a prehistoric terrestrial civilisation, and the 2023 NASA UAP Independent Study Team report equally confirms that no data exists to support the idea that UAPs originate from a hidden or ancient human source. The ODNI's annual UAP reports focus exclusively on contemporary, sensor-detected anomalies and contain nothing that corroborates claims of returning ancient humans periodically visiting Earth. Because the claim combines specific assertions about catastrophic prehistory, ancient human spaceflight, and ongoing revisitations — none of which can be confirmed or definitively disproven through the available approved evidence base — the only honest verdict is unverifiable.
Did the planet Venus destroy every probe we ever sent to it due to its harsh conditions?
Venus is one of the most inhospitable environments in the solar system, with surface temperatures exceeding 460°C and atmospheric pressure roughly 90 times that of Earth — conditions that did eventually destroy every lander sent there. However, the claim falls apart on the word "every," because dozens of missions to Venus were never intended to reach the surface at all; flybys and orbiters such as NASA's Mariner 2, Mariner 5, and the more recent Magellan orbiter completed their objectives without being destroyed by Venusian conditions. More importantly, the Soviet Venera programme achieved a remarkable series of successful landings between the 1970s and 1980s, with probes like Venera 9 and Venera 13 surviving long enough to transmit photographs and scientific data back to Earth before eventually succumbing to the extreme heat and pressure. The claim that Venus "destroyed every probe we ever sent to it" fundamentally misrepresents the history of planetary exploration, ignoring both the deliberate design of non-landing missions and the genuine scientific triumphs of the Venera landers.
There is a star named Stephenson 2-18 which is much bigger than our sun
Stephenson 2-18 — also catalogued as St2-18 or RSGC2-18 — is a red supergiant located in the Scutum constellation, roughly 19,600 light-years from Earth, and is consistently cited in astronomical literature as one of the largest known stars in the observable universe. Current estimates place its radius at approximately 2,150 times that of the Sun, meaning that if positioned at the centre of our solar system, its surface would extend well beyond the orbit of Jupiter and approach that of Saturn. The claim uses the straightforward qualifier "much bigger", which is an understatement rather than an overstatement — Stephenson 2-18 is almost incomprehensibly larger than our Sun by any metric astronomers employ. While measurements of such distant, diffuse red hypergiants carry inherent uncertainties, the scientific consensus firmly and consistently supports the conclusion that this star vastly exceeds the Sun in size.
Area 51 houses multiple generations of reverse-engineered extraterrestrial spacecraft
Area 51 is a real, classified U.S. Air Force installation in Nevada — that much is beyond dispute — but the claim that it houses multiple generations of reverse-engineered extraterrestrial spacecraft finds absolutely no support in any credible, authoritative source. The AARO Historical Record Report Volume 1 (2024) conducted a sweeping review of alleged secret government programmes involving non-human technology and concluded unequivocally that no empirical evidence exists to support the retrieval, storage, or reverse-engineering of extraterrestrial craft at any U.S. facility, including Area 51. AARO further determined that many such claims originated from individuals who either misidentified classified U.S. aerospace programmes — such as the U-2 and SR-71 — or who fabricated accounts that could not be corroborated by any documentation, witness testimony, or physical evidence. The claim therefore fails entirely on its core assertion: the presence of alien spacecraft is unsupported, and the specific characterisation of "multiple generations" of such craft compounds the falsehood further, making a "false" verdict the only appropriate conclusion.
The Soviet Union entirely concealed its manned lunar landing program (N1-L3) from the public until the late 1980s
For roughly two decades after Apollo 11, the Soviet Union maintained an extraordinary official fiction — publicly insisting it had never been engaged in a competitive manned lunar programme, even as it suppressed the truth of four catastrophic N1 rocket failures and the programme's quiet cancellation in 1976. The core of this claim is well-supported: the Soviet state actively denied and concealed the N1-L3 programme from its own citizens and the international community for approximately twenty years, with meaningful public acknowledgement arriving during the glasnost era from around 1989, as confirmed by multiple independent historical sources including declassified Soviet documents and accounts from cosmonauts such as Alexei Leonov. However, the absolute word "entirely" cannot survive scrutiny — Western intelligence agencies, independent space analysts, and amateur radio operators had long suspected or partially reconstructed the existence of Soviet lunar ambitions, meaning the concealment was never perfectly airtight to all outside observers, and the disclosure itself was gradual rather than a single clean admission. The Soviet cover-up was sweeping, sustained, and historically remarkable, but "entirely concealed" overstates the completeness of the deception, making "mostly true" the most precise and defensible verdict.
A breakaway human civilisation already populates outer space with advanced, warp-capable deep space battlecruisers
No credible evidence whatsoever supports the existence of a breakaway human civilisation operating warp-capable deep space battlecruisers, and the claim collapses entirely under scrutiny from approved official sources. AARO's Historical Record Report Volume 1 (2024) explicitly examined allegations of secret off-world programmes and reverse-engineering of advanced technology, concluding that no verifiable evidence substantiates such assertions. The NASA UAP Independent Study Report (2023) similarly found no scientific basis for claims of concealed human space fleets or propulsion systems operating beyond known physics, including theoretical warp drives, which remain firmly in the realm of unproven speculation. The claim is not merely unverified but actively contradicted by every available official source, making a verdict of false — rather than unverifiable — the correct and appropriate rating.
The universe as observed is an engineered quantum computer
At the frontier of theoretical physics, the idea that the universe functions as an engineered quantum computer sits firmly in the realm of philosophical speculation rather than empirical science. Physicists such as Seth Lloyd have proposed models suggesting the universe's evolution can be described in computational terms, and the simulation hypothesis has attracted serious academic attention — yet none of these frameworks have produced testable, falsifiable predictions that could confirm or deny deliberate engineering by an external agent. Recent analyses have further challenged the computational feasibility of such a scenario, arguing that the resources required to simulate physical reality at the quantum level would exceed anything physically realisable within the known universe. Without empirical evidence, a scientific consensus, or a viable experimental test, this claim cannot be verified or refuted by any currently available means.
Planet Mars has gravity
Every object with mass generates a gravitational field, and Mars — with a mass of approximately 6.39 × 10²³ kilograms — is no exception. Scientific measurements from decades of NASA and ESA missions confirm that the surface gravity on the Red Planet is approximately 3.71 metres per second squared, which is roughly 38 per cent of Earth's gravitational pull. This figure is well-established across multiple independent sources, including NASA's Mars Quick Facts and data published by the European Space Agency, leaving no ambiguity whatsoever. The claim is therefore straightforwardly and entirely accurate, with no missing context, no extreme wording to scrutinise, and no causal or temporal traps to unpack.
NASA deliberately cuts the live International Space Station video feed whenever an unidentified flying object appears
No credible evidence exists — across AARO reports, ODNI UAP assessments, or any declassified government documentation — to support the assertion that NASA deliberately cuts the ISS live feed to conceal unidentified objects. The word "deliberately" carries a specific causal burden: it requires proof of intentional human action directed at concealment, and that burden is entirely unmet. Signal interruptions are a well-documented consequence of the station's orbital mechanics, occurring when the ISS passes outside the coverage arcs of Tracking and Data Relay Satellites and ground stations — a routine, predictable, and infrastructure-driven phenomenon that affects all data transmission, not selectively objects of interest. The 2023 NASA UAP Independent Study Team report, far from endorsing cover-up narratives, explicitly called for greater transparency and the development of better data-collection tools, which is wholly inconsistent with an agency engaged in deliberate suppression of UAP-related footage.