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Comets News 17 September 2025 - 28 October 2025

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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Rare Interstellar Comet 3I/ATLAS – a 10-Billion-Year-Old Time Capsule – Flies Past Mars

Alien Comet 3I/ATLAS Is Spewing Water Like a Fire Hose — And Scientists Are Stunned

These astounding discoveries come from coordinated observations worldwide. Below we delve into the details: what we’ve learned about 3I/ATLAS, how it compares to other interstellar visitors, and why scientists are so excited. What Is 3I/ATLAS? A Rare Interstellar Comet 3I/ATLAS (sometimes simply called “ATLAS”) is an interstellar comet – a chunk of ice and rock that formed around a distant star and is now speeding through our Solar System on a one-way trip. It was first spotted on July 1, 2025, by the Asteroid Terrestrial-impact Last Alert System (ATLAS) telescope in Chile ts2.tech. Follow-up analyses quickly confirmed its hyperbolic orbit
12 October 2025
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Rare Interstellar Comet 3I/ATLAS – a 10-Billion-Year-Old Time Capsule – Flies Past Mars

Rare Interstellar Comet 3I/ATLAS – a 10-Billion-Year-Old Time Capsule – Flies Past Mars

A Visitor from Beyond the Solar System Humanity has waited a long time to study a comet from another star – and suddenly, within a decade, we’ve had three. 3I/ATLAS (officially 3I/2025 A1) is the latest of these rare interstellar interlopers. It was first detected moving through the outer Solar System in June 2025 with an exceptionally eccentric orbit. Follow-up observations quickly confirmed what its speed and trajectory implied: this object was not bound to the Sun’s gravity ts2.tech. By July 2025, the Minor Planet Center designated it the third interstellar object ever found ts2.tech. Like its predecessors – the cigar-shaped 1I/‘Oumuamua and cometary 2I/Borisov –
8 October 2025
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Northern Lights, Draconid Meteors & Bright Comets – Skywatch Highlights for Oct 7–8, 2025

Northern Lights, Draconid Meteors & Bright Comets – Skywatch Highlights for Oct 7–8, 2025

Draconid Meteor Shower Peaks in Early Evening The Draconid meteor shower – a minor but convenient annual shower – is active October 6–10 and is expected to peak on the night of October 8, 2025 livescience.com. The Draconids are so named because their meteors appear to fan out from the head of the constellation Draco, the Dragon, which lies in the northwestern sky after nightfall in October science.nasa.gov livescience.com. Unlike many meteor showers that are best in the wee hours of morning, the Draconids are most easily viewed in the early evening – just after darkness falls – because Draco’s
7 October 2025
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Interstellar Comet 3I/ATLAS Shrouded in CO₂ Fog – NASA’s SPHEREx Reveals a Cosmic Visitor’s Secrets

Is 3I/ATLAS an Interstellar Messenger? New Findings Debunk Alien Rumors but Reveal an Ancient, Carbon‑Rich Comet

A Rare Interstellar Visitor When astronomers with the Asteroid Terrestrial‑impact Last Alert System (ATLAS) noticed an object with an extraordinarily high orbital eccentricity racing through the outer solar system in June 2025, they immediately suspected an interstellar origin. Follow‑up observations confirmed that the body, now designated 3I/ATLAS, follows a hyperbolic path and moves faster than any known comet, approximately 210 000 km per hour esa.int. Unlike periodic comets, this object will never return once it leaves the Sun’s gravitational grasp, making it only the third confirmed interstellar visitor after ʻOumuamua in 2017 and 2I/Borisov in 2019 science.nasa.gov. The comet’s trajectory takes it between
5 October 2025
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Two Comets Will Light Up October’s Night Sky – When and How to Watch

Two Comets Will Light Up October’s Night Sky – When and How to Watch

Two Icy Visitors from the Outer Solar System This fall’s night sky brings not one but two comets into view – a rare cosmic coincidence that has amateur astronomers buzzing. Comet C/2025 A6 (nicknamed Lemmon) and Comet C/2025 R2 (SWAN) both formed in the frigid outskirts of the solar system and have traveled inward for the first time in millennia. “These features make ‘Lemmon’ a striking reminder of the icy wanderers that visit the inner solar system from the distant Oort Cloud,” noted astronomer Aleix Roig after capturing the comet’s eerie green glow in late September space.com. Comets like these
4 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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Cosmic Skywatch Alert: Geomagnetic Storms, Shooting Stars & Comets Light Up Late Sep–Early Oct 2025

Cosmic Skywatch Alert: Geomagnetic Storms, Shooting Stars & Comets Light Up Late Sep–Early Oct 2025

Space Weather & Aurora Forecast NOAA forecasts a Strong (G3) geomagnetic storm on Sept 30, 2025. According to SWPC, “G3 (Strong) geomagnetic storming is expected through 30/1200 UTC due to CME influences” swpc.noaa.gov. This follows an M6.4-class solar flare on Sept 29 (from active Region 4232), which caused an R2-level radio blackout swpc.noaa.gov. Aurora experts note that such storms can power dazzling Northern Lights. The peak storming late Sept 30 (early Oct 1 UT) means northern skies may glow. “Quiet to active” conditions are forecast after the storm, so Sept 30 is the prime aurora night. (Skywatchers should watch real-time SWPC
30 September 2025
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Saturn Dazzles, New Comet Rises, and Auroras Loom: Skywatch Alert for Sept 24–25, 2025

Saturn Dazzles, New Comet Rises, and Auroras Loom: Skywatch Alert for Sept 24–25, 2025

Saturn Steals the Show If you step outside on these late-September nights, Saturn immediately grabs your attention. The ringed planet reached opposition (when Earth passed directly between Saturn and the Sun) on September 21, and it remains exceptionally bright and gorgeous in the sky planetary.org. At opposition Saturn is closest to Earth for the year, so it shines at maximum brilliance and is visible all night, rising around sunset and setting near dawn. “Saturn will be at its closest and brightest all year!” as NASA explains science.nasa.gov – truly the best time to enjoy this gas giant. Look for Saturn
24 September 2025
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Interstellar Comet 3I/ATLAS: A Visitor from Beyond the Solar System

Rare Interstellar Comet Racing Through Our Solar System Could Be the Oldest Ever Seen

A Mysterious Visitor from Beyond the Solar System Interstellar comet 3I/ATLAS photographed under dark skies during a lunar eclipse, revealing an emerald-green coma surrounding its nucleus space.com. This rare alien comet carries chemical clues from a distant star system. In September 2025, skywatchers in Namibia captured a stunning sight: a ghostly green comet drifting against the starry backdrop of space. This was 3I/ATLAS, an interstellar comet – a piece of another star system – paying a brief visit to our cosmic neighborhood. Only two interstellar objects had ever been seen before (the infamous ‘Oumuamua in 2017 and comet 2I/Borisov in
17 September 2025
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