Astronomers Found NEW Strange Surrounding 3I ATLAS Made it Begins Glowing Green! What happened..

Adding to the intrigue of the third mysterious interstellar comet, 3i Atlas, on September 7th, astrophotographers Michael Yeager and Gerald Raymond managed to capture stunning deep images of a puzzling event. The comet's glow, which had been a reddish hue, suddenly shifted to a striking green-blue. So, what exactly happened inside that hazy coma? To understand this, we first need to look at why 3i Atlas appeared red in the beginning. That initial reddish glow comes mainly from larger dust grains in its coma, made up of irradiated organic compounds. These are similar to what we see in d-type asteroids and many familiar comets within our solar system. The dust is rich in organics and likely holds complex molecules called tholins, which scatter sunlight in a way that gives off that reddish tint. Importantly, this glow likely comes from surface dust or layers that have been lifted off the comet's crust, not fresh material from deep within. In fact, it closely resembles the dark red-brown surfaces of outer solar system bodies, like trans-Neptunian objects and centaurs. However, as this object travels closer to the sun, we gain a rare opportunity to peek into its hidden interior. This happens because the heat triggers sublimation on the surface of 3i Atlas, releasing volatile compounds that were long trapped in its surface and subsurface layers. Using the Very Large Telescope, astronomers detected a key component, cyanide, which showed a sharp spike in activity around August 25, 2025, when 3i Atlas was about 3.3 astronomical units from the sun, or roughly 3.3 times the Earth-sun distance. Even more intriguing, not just cyanide but also nickel, without any accompanying iron, was found to surge dramatically at that same distance. Also, data from the Atlas Telescope going back to March 2025 showed that the brightness of the light scattered by the comet changed in a unique way as it got closer to the sun. When it was farther than 3.3 astronomical units, the brightness grew quickly because sunlight was reflecting off dust on the comet's reddish surface. This explains the initial reddish glow of 3i Atlas, but as the comet got closer, the growth slowed down because the comet started producing more tiny bright ice grains instead of dusty material. These icy grains made the comet's glow look different and changed how the cloud around the comet blocked light. In short, the comet's color change is linked to more cyanide and ice being released as it moves nearer to the sun, changing the way it looks through telescopes. About two weeks before the Very Large Telescope detected the sharp increase in cyanide production on 3i Atlas, the SPHERICS Space Observatory, between August 8 to 12, 2025, reported that carbon dioxide overwhelmingly dominated the comet's gas plume, making up as much as 87% by mass. In comparison, carbon monoxide accounted for about 9%, while water made up most of the remaining 4%. Supporting this, data from the Webb Space Telescope on August 6, 2025, revealed the same composition. This sets 3i Atlas apart from most comets in our solar system, which usually contain more water ice relative to carbon dioxide. What makes it even more remarkable is its orbital path. 3i Atlas happens to be aligned with the ecliptic plane of the planets around the sun, a coincidence with only about a 0.2% chance. Together, these features mark it as strikingly anomalous compared to the icy bodies we know, even when set against the two previous interstellar visitors. Unlike Oumuamua, which showed no signs of outgassing or evaporation, but exhibited strange non-gravitational acceleration and a varying light curve, 3i Atlas has a more stable brightness and shows faint comet-like activity with a red spectral slope similar to Oumuamua. In comparison to Borisov, which behaved like a typical comet with significant cometary activity, 3i Atlas also displays comet-like characteristics such as a coma and tail, but with differences in size and activity level. Interestingly, neither Oumuamua nor Borisov showed an anti-tail like the one seen on 3i Atlas on July 21, the Hubble Space Telescope captured evidence of scattered light extending toward the sun, a stark contrast to the typical cometary tail that points away from it. At that time, 3i Atlas was about 3.8 astronomical units from the sun. What makes this so unusual is that the anti-tail wasn't the result of a geometric illusion or perspective trick. Instead, it was a genuine physical feature, an elongated glow stretching sunward, something never before documented in any solar system comet. Avi Loeb and his colleagues suggest that the anti-tail is caused by sunlight scattering off sublimating ice grains released from 3i Atlas, rather than from refractory dust particles as once thought. These ice grains are incredibly tiny, about half a micrometer, roughly the size of the wavelength of sunlight. When sunlight strikes the comet, ice on the sun-facing side evaporates, pushing these grains outward. Because the evaporation is so intense on that side, larger ice particles manage to survive longer and drift farther toward the sun, producing the glowing extension we call the anti-tail. Put simply, it's like an extended snow line, where ice grains last longer on the sun-facing side than anywhere else. Different angles of sunlight lead to different evaporation rates, which affect how far the grains can travel before disappearing. This variation makes the anti-tail visible, as scattered light reflects from the ice grains directly sunward. The findings about the makeup of this anti-tail are fascinating. While the gas escaping from the comet's surface is primarily carbon dioxide vapor, as detected by the James Webb and SPHERICS space observatories, the grains that last the longest are mostly composed of water ice, which evaporates much more slowly than carbon dioxide ice. At this stage you might be asking yourself why the anti-tail phenomenon shows up on 3i Atlas. The anti-tail of a comet like 3i Atlas happens because of a special mix of what the is made of and how much sunlight it gets. These things affect how much ice on the comet turns directly into gas, called sublimation, and how fast tiny ice grains break apart. Most of the light you see in the anti-tail comes from these tiny ice grains that are easy to change, volatile. For an anti-tail to form, the ice turning into gas and the push from sunlight should not be too strong, or else a normal tail pointing away from the sun would form instead. Because of this, anti-tails usually show up when the comet is still far from the sun, where the sunlight isn't too intense. To see an anti-tail clearly, we need very detailed pictures taken from powerful telescopes, like the Hubble Space Telescope. As the comet moves closer to the sun, the sunlight and heat change the way the ice evaporates, so the shape and glow of the comet's anti-tail also change. It's clear that studying the anti-tail of 3i Atlas gives us indirect but valuable clues about the comet's nucleus and surface activity. The anti-tail emerges because ice grains ejected from the nucleus survive longer in certain directions, especially sunward, due to uneven sublimation across the comet's surface. In other words, the anti-tail reveals how the nucleus is shedding ice grains, and how sunlight heats different areas unevenly, driving an anisotropic outflow of material. By analyzing its shape, brightness, and angular extent, scientists can infer the rate of gas escaping from the surface, as well as the size, speed, and survival times of the ice grains streaming out of the nucleus. By contrast, Avi argues that the teardrop-shaped plume seen around comet 3i Atlas, captured by the Gemini South Telescope in early September, doesn't reveal anything about the nucleus itself. Instead, it's shaped by solar radiation and the solar wind. This form is simply the outcome of gas dynamics, the way gas behaves and spreads in space. Think of it like smoke drifting in the wind. From the shape of the smoke, you can't really tell what's burning beneath. In the same way, the teardrop shape doesn't give us direct details about the comet's solid core. It only shows how the gas and ice released from the nucleus are being pushed and molded by sunlight and solar wind as they stream outward. Without an actual image of the nucleus, the plume's shape is no more diagnostic of the core than the shape of smoke is of whether it comes from a campfire or a car engine. Beyond the natural explanation for the anti-tail, there's also an artificial hypothesis tied to propulsion technology. According to this idea, what we see as a dust anti-tail might actually be a swarm of nanomachines clearing obstacles in 3i Atlas's path. These hypothetical machines would have been especially useful while the object was racing through interstellar space, where even tiny particles could pose catastrophic risks. To deal with such hazards, the nanomachines might deploy high-energy lasers to burn or ionize dust, or use electromagnetic scoops to collect it and repurpose it as fuel. Avi Loeb has likened this phenomenon to the exhaust from a spacecraft's ion thrusters. He points out that if an advanced civilization wanted to slow down their vessel after a long interstellar voyage, they could orient the engines toward the sun and fire them at perihelion, taking advantage of the Oberth effect to maximize braking. Interestingly, the traits of ion engine exhaust, narrow focused streams of energetic ions along with heavy dust and clumps, line up closely with what telescopes have recorded in the plume of 3i Atlas. At NASA's Jet Propulsion Lab, some analysts have even started informally referring to this as a propulsive signature, though the official scientific literature sticks with the more cautious description of non-gravitational perturbation. Loeb also notes that if someone wanted to conceal a maneuver, the perfect time would be at perihelion, when the sun blocks Earth's line of sight, a moment 3i Atlas will reach in late October. This event is known as a solar conjunction. It's the period when an object, like 3i Atlas, slips behind the sun from our viewpoint and vanishes from telescope observations on Earth. The sun's disk completely hides it, cutting off any direct monitoring. This creates a classic blind spot in both planetary defense and interplanetary navigation, where even the best observatories lose track of the target. During solar conjunction, there's no visible light, no radar echoes, and no chance for direct observation. 3i Atlas is set to enter solar conjunction in late October 2025. On October 30th, 2025, it will slip behind the sun and remain hidden for several weeks. What makes this solar occultation especially significant is that it coincides with the comet's perihelion, the point in its orbit closest to the sun. This timing adds weight to the event, as it not only marks a critical orbital milestone, but also creates a window in which the object's anomalies could evolve or shift unseen. With no direct observations possible during this period, the mystery of 3i Atlas' origins and behavior only deepens. The appearance of 3i Atlas, along with other interstellar objects like Oumuamua, which also has unexplained non-gravitational acceleration, is forcing astronomers to reconsider what might be happening in interstellar space and raising deeper questions about the mysteries the universe may hold.