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Alien Probe or Cosmic Relic? Interstellar Comet 3I/ATLAS Baffles Scientists (updated 27.10.2025)

3I/ATLAS Today (Nov. 7, 2025): New green-glow image, ‘color‑change’ myth debunked, and where to see the interstellar comet now

Updated: Nov. 7, 2025 — This roundup focuses on developments reported today (7.11.2025). Key updates at a glance What scientists reported today Green glow, “hidden” tail—here’s the physics. A new image captured with the Lowell Discovery Telescope shows 3I/ATLAS brightest through a filter sensitive to diatomic carbon (C₂), which fluoresces green in sunlight. The dust tail isn’t gone—you’re seeing it almost head‑on, so it blends with the coma and appears subdued. That geometry explains images where the tail seems to “disappear.” Live Science No, it hasn’t “changed color.” A preprint that compared sun‑skirting observations led to headlines about dramatic hue
8 November 2025
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Alien Probe or Cosmic Relic? Interstellar Comet 3I/ATLAS Baffles Scientists (updated 27.10.2025)

Third Interstellar Comet 3I/ATLAS Stuns Scientists With Surprising Brightening and Blue Glow

Discovery and Interstellar Identity Comet 3I/ATLAS (officially Interstellar Comet 3I/ATLAS) was first spotted on July 1, 2025, by the NASA-funded ATLAS (Asteroid Terrestrial-impact Last Alert System) telescope in Río Hurtado, Chile newsweek.com. Right away, its orbit stood out as hyperbolic, meaning it isn’t bound to the Sun by gravity and is just passing through. This identified 3I/ATLAS as an interstellar object – a rare visitor from another star system. It is only the third such interstellar traveler ever detected, after the mysterious cigar-shaped 1I/ʻOumuamua in 2017 and the comet 2I/Borisov in 2019 space.com. The “3I” designation literally means third interstellar,
4 November 2025
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Alien Probe or Cosmic Relic? Interstellar Comet 3I/ATLAS Baffles Scientists (updated 27.10.2025)

Interstellar Comet 3I/ATLAS Stuns Scientists with Surprising Bright Outburst and Ancient Origins

A Visitor From Beyond the Solar System In July 2025, astronomers discovered something extraordinary: a dim, fuzzy comet hurtling toward the inner solar system on a path not bound to the Sun. Follow-up observations confirmed this object – now named 3I/ATLAS (for the ATLAS survey that found it) – was on a hyperbolic trajectory, meaning it came from interstellar space and would soon depart forever science.nasa.gov en.wikipedia.org. The “3I” designation marks it as the third interstellar object ever observed, after the asteroid-like 1I/ʻOumuamua and comet 2I/Borisov science.nasa.gov. Unlike ʻOumuamua (which was small, oddly shaped, and showed no coma), 3I/ATLAS immediately
4 November 2025
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Alien Probe or Cosmic Relic? Interstellar Comet 3I/ATLAS Baffles Scientists (updated 27.10.2025)

Mysterious Interstellar Comet 3I/ATLAS Nears Sun – 10-Billion-Year Visitor Sparks Alien Theories and Scientific Awe

Key Facts and Highlights A Visitor From Beyond the Solar System In July 2025, astronomers spotted a faint newcomer inbound toward the Sun – one that was not gravitationally bound to our star at all. The object, now designated 3I/ATLAS, is only the third interstellar visitor ever detected in our solar system ts2.tech. (The “3I” prefix marks it as the third Interstellar object.) It was first observed on July 1, 2025 by the ATLAS sky-survey telescope in Río Hurtado, Chile, and its discovery immediately caused excitement. The reason? Its orbit was hyperbolic, meaning it’s not a periodic comet from our Oort
29 October 2025
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Rare Interstellar Comet 3I/ATLAS – a 10-Billion-Year-Old Time Capsule – Flies Past Mars

Largest & Oldest Interstellar Comet Ever Seen Nears Sun – 3I/ATLAS Blasts Water ‘Like a Fire Hose’

Image: Interstellar comet 3I/ATLAS (center) streaking through the stars, captured on Aug. 27, 2025 by the Gemini South telescope in Chile. As the comet nears the Sun, solar radiation vaporizes ice in its nucleus, unleashing jets of gas and dust that form a growing tail livescience.com. A Visitor From Beyond the Solar System Astronomers in late July 2025 realized that a faint new comet spotted by the ATLAS survey was no ordinary object – its orbit was highly eccentric (e > 1), meaning it wasn’t bound to the Sun at all space.com. This was the tip-off that the comet, now
28 October 2025
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Rare Interstellar Comet 3I/ATLAS – a 10-Billion-Year-Old Time Capsule – Flies Past Mars

Interstellar Comet 3I/ATLAS Unleashes Bizarre Sunward Jet as Scientists Quash Alien Rumors Ahead of Solar Swing-By

Interstellar Mystery Lights Up the Solar System An interstellar vagabond is currently streaking through our Solar System, and it’s making waves both in the scientific community and the public imagination. Officially designated 3I/ATLAS (C/2025 N1), this object is only the third interstellar visitor ever observed – a comet from another star now paying us a brief visit ts2.tech. First detected on July 1, 2025 by the ATLAS sky-survey telescope in Chile, 3I/ATLAS immediately stood out: it was moving extremely fast on a one-way hyperbolic trajectory, meaning it is unbound to the Sun and came from far outside our Solar System ts2.tech.
26 October 2025
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Rare Interstellar Comet 3I/ATLAS – a 10-Billion-Year-Old Time Capsule – Flies Past Mars

Interstellar Comet 3I/ATLAS Shoots Giant Sunward Jet — Experts Debunk Alien Probe Rumors

In recent weeks astronomers have been fascinated by the interstellar comet 3I/ATLAS as it rushes through the inner Solar System. First spotted by the ATLAS telescope (Chile) on July 1 ts2.tech, it turned out to be moving so fast on a hyperbolic path that it could only have come from outside our solar neighborhood. Follow-up orbits confirm it is on a one-way trip, never to return ts2.tech. Importantly, orbital calculations show its minimum distance from Earth is about 1.8 AU (far beyond Mars) ts2.tech, so it will not collide with us. In fact, the comet’s closest brush with any planet was
26 October 2025
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Interstellar Comet 3I/ATLAS: A Visitor from Beyond the Solar System

Rare Cosmic Flyby: Interstellar Comet 3I/Atlas to Zip Past Mars as Spacecraft Brace for Close-Up Study

Looking Ahead: What 3I/Atlas Can Teach Us This week’s close approach marks just the beginning of an intensive observation campaign. Once 3I/Atlas dives behind the Sun in late October, Earth-based telescopes will lose it, but Mars and Jupiter satellites (and later telescopes on Earth in December) will continue the story. During perihelion and its outbound journey past Jupiter (in early 2026) the comet should reveal its secrets – or at least its usual cometary face. As one commentator notes, watching 3I/Atlas in this active phase “will give some of the clearest insights yet into the mystery of interstellar comets” space.com.
4 October 2025
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Interstellar Comet 3I/ATLAS Shrouded in CO₂ Fog – NASA’s SPHEREx Reveals a Cosmic Visitor’s Secrets

Interstellar Comet 3I/ATLAS Shrouded in CO₂ Fog – NASA’s SPHEREx Reveals a Cosmic Visitor’s Secrets

3I/ATLAS (C/2025 N1 ATLAS) was discovered July 1, 2025 by the ATLAS survey telescope in Chile and is on a hyperbolic, unbound path with eccentricity ~6.2, making it the third confirmed interstellar object after 1I/‘Oumuamua and 2I/Borisov. Early estimates suggested a diameter of several kilometers, and Hubble data later indicated a nucleus of about 5–6 km across, making 3I/ATLAS the largest interstellar object observed. SPHEREx detected a huge CO₂ cloud around 3I/ATLAS, with the coma extending at least 348,000 km from the nucleus, alongside evidence of water ice in the nucleus. JWST measurements found a CO₂-to-H₂O ratio of roughly 8:1
5 September 2025
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Interstellar Comet 3I/ATLAS: A Visitor from Beyond the Solar System

Interstellar Comet 3I/ATLAS: A Visitor from Beyond the Solar System

3I/ATLAS was first spotted on July 1, 2025 by the ATLAS telescope in Río Hurtado, Chile, and officially designated 3I/2025 A1 (ATLAS), the third confirmed interstellar object after 1I/‘Oumuamua (2017) and 2I/Borisov (2019). It is traveling through the inner solar system at about 60–61 kilometers per second relative to the Sun on a hyperbolic trajectory, with perihelion near the orbit of Mars in late October 2025 (about 1.4 AU). Its closest approach to Earth will be roughly 1.6–1.8 AU (240–270 million kilometers), and it will be behind the Sun from Earth’s perspective at that time, posing no threat. The Hubble
19 August 2025
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3I/ATLAS: The Fastest Interstellar Comet Ever—Here’s What Scientists Are Saying

Interstellar Comet 3I/ATLAS – Third Cosmic Visitor Unveiled, Fast and Enormous

3I/ATLAS is the third interstellar object ever recorded. It was first spotted on July 1, 2025 by the ATLAS survey telescope in Río Hurtado, Chile. The designation 3I/ATLAS marks it as the third interstellar object in our solar system. Its orbit is hyperbolic with an eccentricity of about 6.2, meaning it is unbound and will exit the solar system. A faint coma was observed around 3I/ATLAS within days of discovery, confirming it is a comet. The object was traveling over 60 km/s at discovery and about 68 km/s at perihelion. Perihelion was predicted for October 29–30, 2025 at roughly 1.4
2 August 2025
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Interstellar Comet 3I/ATLAS: Origin, Trajectory and Scientific Stakes In 2025’s Third‑Ever Extrasolar Visitor

Interstellar Comet 3I/ATLAS: Origin, Trajectory and Scientific Stakes In 2025’s Third‑Ever Extrasolar Visitor

<li ATLAS imaged the interstellar candidate on 1 July 2025, with precovery back to 14 June 2025, and it was designated C/2025 N1 (ATLAS) and later 3I/ATLAS as the third confirmed interstellar object after Oumuamua and Borisov. <li A JPL orbital solution yields eccentricity e = 6.1 ± 0.1 and hyperbolic excess velocity V∞ ≈ 58 km/s, indicating an extrasolar origin from Galactic longitude about 5° toward the Galactic Center. <li The object’s nucleus is estimated at 9–20 km in diameter, with a developing coma and tail already visible, including a compact coma at about 4.5 AU from the Sun.
8 July 2025
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