Despite an unsubstantiated claim circulating online, the Euclid space telescope did not announce the 'two oldest quasars ever found' on July 6, 2026.
Search & fact-check with cited sources for What new discoveries about ancient quasars did the Euclid space telescope announce on July 6, 202Conceptual illustration of distant quasars — ancient, luminous objects powered by supermassive black holes — that the Euclid space telescope is surveying across the cosmos.
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Create a landscape editorial hero image for this Studio Global article: Search & fact-check with cited sources for What new discoveries about ancient quasars did the Euclid space telescope announce on July 6, 202. Article summary: I searched extensively for a July 6, 2026 Euclid announcement about ancient quasars, including the "two oldest quasars ever found," but **no such announcement is present in the public web record as of today (July 6, 2026. Topic tags: general, government, academic, general web, user generated. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, wate
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On July 6, 2026, an unfounded claim began circulating that the European Space Agency's Euclid space telescope had announced the discovery of the "two oldest quasars ever found," with specific details about redshifts, distances, and implications for supermassive black hole growth. A thorough search of the public record — including ESA press releases, the Euclid Consortium news archive, NASA announcements, academic preprints, and major astronomy news outlets — found no such announcement.
This article documents what Euclid has actually discovered about ancient quasars as of mid-2026, what claims can be verified, and what discoveries are genuinely expected in the coming months.
Euclid's Real Quasar Discoveries (So Far)
Euclid, launched in July 2023 and designed primarily to map dark matter and dark energy across a third of the sky, has already returned substantial quasar data through its early survey releases .
Quick Data Release 1 (Q1): Thousands of New Quasar Candidates
Euclid's Quick Data Release 1 (Q1) was published in March–June 2026, covering just 63 square degrees of sky — only 0.45% of its nominal survey area . Even at this early stage, the dataset includes , identified using AI and machine learning algorithms . These candidates have been detected with unprecedented positional accuracy and have already enabled statistical confirmation of how galaxy mergers drive AGN activity .
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Despite an unsubstantiated claim circulating online, the Euclid space telescope did not announce the 'two oldest quasars ever found' on July 6, 2026.
Search & fact-check with cited sources for What new discoveries about ancient quasars did the Euclid space telescope announce on July 6, 202Conceptual illustration of distant quasars — ancient, luminous objects powered by supermassive black holes — that the Euclid space telescope is surveying across the cosmos.
AI Prompt
Create a landscape editorial hero image for this Studio Global article: Search & fact-check with cited sources for What new discoveries about ancient quasars did the Euclid space telescope announce on July 6, 202. Article summary: I searched extensively for a July 6, 2026 Euclid announcement about ancient quasars, including the "two oldest quasars ever found," but **no such announcement is present in the public web record as of today (July 6, 2026. Topic tags: general, government, academic, general web, user generated. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, wate
openai.com
On July 6, 2026, an unfounded claim began circulating that the European Space Agency's Euclid space telescope had announced the discovery of the "two oldest quasars ever found," with specific details about redshifts, distances, and implications for supermassive black hole growth. A thorough search of the public record — including ESA press releases, the Euclid Consortium news archive, NASA announcements, academic preprints, and major astronomy news outlets — found no such announcement.
This article documents what Euclid has actually discovered about ancient quasars as of mid-2026, what claims can be verified, and what discoveries are genuinely expected in the coming months.
Euclid's Real Quasar Discoveries (So Far)
Euclid, launched in July 2023 and designed primarily to map dark matter and dark energy across a third of the sky, has already returned substantial quasar data through its early survey releases .
Quick Data Release 1 (Q1): Thousands of New Quasar Candidates
Euclid's Quick Data Release 1 (Q1) was published in March–June 2026, covering just 63 square degrees of sky — only 0.45% of its nominal survey area . Even at this early stage, the dataset includes , identified using AI and machine learning algorithms . These candidates have been detected with unprecedented positional accuracy and have already enabled statistical confirmation of how galaxy mergers drive AGN activity .
Studio Global AI
Continue your research
This page includes a source-backed answer you can continue inside Studio Global.
thousands of new quasar and active galactic nucleus (AGN) candidates
3,500 Bright Quasars with Measured Redshifts
A dedicated Euclid spectroscopy paper (arXiv 2512.08803) identifies and determines redshifts for 3,500 bright quasars — a major step forward for statistical studies of the quasar population .
A Candidate Dual Quasar System
A study on red quasars selection (arXiv 2503.15319) showcases Euclid's near-infrared photometry, revealing a candidate dual quasar system — two quasars in close physical proximity, likely representing a merger of two galaxies with active black holes . The same study produced a catalog of more than 150,000 red quasar candidates, providing a first census for future work with the Euclid Wide Survey .
7,000 Candidate Quasars Expected
ESA has stated that Euclid's deep fields contain a "small population of bright quasars that can be seen much farther away" and that the mission expects to capture some 7,000 candidate quasars overall .
What Euclid Has NOT Found (Yet)
Despite these impressive results, the specific claim about the "two oldest quasars ever found" on July 6, 2026, is unsubstantiated. Here is why:
The Farthest Known Quasar Is Still UHZ1
As of mid-2026, the farthest known quasar remains UHZ1 at redshift z ~ 10.1, seen approximately 13.2 billion light-years away, about 400 million years after the Big Bang . This discovery was made by other observatories, not Euclid.
The Oldest Known Supermassive Black Hole: J0313-1806
The oldest known supermassive black hole (from quasar J0313-1806 at z = 7.64, dating to approximately 670 million years after the Big Bang) was discovered in 2021 by an international team led by the University of Arizona, again without Euclid involvement .
The Earliest Known Flickering Quasar
On June 8, 2026 — less than a month before the unsubstantiated claim — MIT announced the discovery of the earliest known flickering quasar, traced to just 850 million years after the Big Bang . This was a significant finding, but it was not a Euclid discovery; it came from MIT researchers analyzing data from other observatories .
The Big Picture: Why Euclid's October 2026 Data Release Matters
Euclid's first cosmology data is scheduled for public release in October 2026. This release will include deep-field observations collected over multiple passes, providing significantly deeper sensitivity to high-redshift quasars. Any major quasar discovery involving "the two oldest quasars ever found" with specific redshift and distance details would most likely be announced at or after that data release.
Simulations show that synergies between Euclid, the Roman Space Telescope, and JWST could reveal quasars at redshifts up to z ~ 14–15, potentially detecting black holes like UHZ1 and GHZ9 at much earlier stages of evolution . This is the kind of breakthrough that astronomers are genuinely anticipating — but it has not happened yet.
How to Verify Future Euclid Announcements
For anyone tracking Euclid's real discoveries, the official sources to monitor are:
The unsubstantiated claim that July 6, 2026 marked the discovery of the "two oldest quasars ever found" is particularly questionable because it ignores the established discovery timeline. It took astronomers from 2011 (ULAS J1120+0641 at z=7.1) to 2021 (J0313-1806 at z=7.64) to push the quasar redshift record by just 0.54 . The leap to discovering multiple quasars older than the current record holder in a single announcement would be unprecedented — and there is no evidence it occurred.
If you encounter an article making this claim, verify it against the official sources above. As of mid-2026, Euclid is delivering valuable quasar science at an impressive scale, but the "two oldest quasars ever found" remain undiscovered.
arxiv.org
Euclid Quick Data Release (Q1): Euclid spectroscopy of quasars. 1. Identification and redshift determination of 3500 bright quasars
thousands of new quasar and active galactic nucleus (AGN) candidates
3,500 Bright Quasars with Measured Redshifts
A dedicated Euclid spectroscopy paper (arXiv 2512.08803) identifies and determines redshifts for 3,500 bright quasars — a major step forward for statistical studies of the quasar population .
A Candidate Dual Quasar System
A study on red quasars selection (arXiv 2503.15319) showcases Euclid's near-infrared photometry, revealing a candidate dual quasar system — two quasars in close physical proximity, likely representing a merger of two galaxies with active black holes . The same study produced a catalog of more than 150,000 red quasar candidates, providing a first census for future work with the Euclid Wide Survey .
7,000 Candidate Quasars Expected
ESA has stated that Euclid's deep fields contain a "small population of bright quasars that can be seen much farther away" and that the mission expects to capture some 7,000 candidate quasars overall .
What Euclid Has NOT Found (Yet)
Despite these impressive results, the specific claim about the "two oldest quasars ever found" on July 6, 2026, is unsubstantiated. Here is why:
The Farthest Known Quasar Is Still UHZ1
As of mid-2026, the farthest known quasar remains UHZ1 at redshift z ~ 10.1, seen approximately 13.2 billion light-years away, about 400 million years after the Big Bang . This discovery was made by other observatories, not Euclid.
The Oldest Known Supermassive Black Hole: J0313-1806
The oldest known supermassive black hole (from quasar J0313-1806 at z = 7.64, dating to approximately 670 million years after the Big Bang) was discovered in 2021 by an international team led by the University of Arizona, again without Euclid involvement .
The Earliest Known Flickering Quasar
On June 8, 2026 — less than a month before the unsubstantiated claim — MIT announced the discovery of the earliest known flickering quasar, traced to just 850 million years after the Big Bang . This was a significant finding, but it was not a Euclid discovery; it came from MIT researchers analyzing data from other observatories .
The Big Picture: Why Euclid's October 2026 Data Release Matters
Euclid's first cosmology data is scheduled for public release in October 2026. This release will include deep-field observations collected over multiple passes, providing significantly deeper sensitivity to high-redshift quasars. Any major quasar discovery involving "the two oldest quasars ever found" with specific redshift and distance details would most likely be announced at or after that data release.
Simulations show that synergies between Euclid, the Roman Space Telescope, and JWST could reveal quasars at redshifts up to z ~ 14–15, potentially detecting black holes like UHZ1 and GHZ9 at much earlier stages of evolution . This is the kind of breakthrough that astronomers are genuinely anticipating — but it has not happened yet.
How to Verify Future Euclid Announcements
For anyone tracking Euclid's real discoveries, the official sources to monitor are:
The unsubstantiated claim that July 6, 2026 marked the discovery of the "two oldest quasars ever found" is particularly questionable because it ignores the established discovery timeline. It took astronomers from 2011 (ULAS J1120+0641 at z=7.1) to 2021 (J0313-1806 at z=7.64) to push the quasar redshift record by just 0.54 . The leap to discovering multiple quasars older than the current record holder in a single announcement would be unprecedented — and there is no evidence it occurred.
If you encounter an article making this claim, verify it against the official sources above. As of mid-2026, Euclid is delivering valuable quasar science at an impressive scale, but the "two oldest quasars ever found" remain undiscovered.
arxiv.org
Euclid Quick Data Release (Q1): Euclid spectroscopy of quasars. 1. Identification and redshift determination of 3500 bright quasars
