A new cosmic event has captivated astronomers as the interstellar comet 3I/ATLAS races through our solar system. Detected in 2025, this massive object is drawing attention due to its significant size, estimated to have a nucleus up to 15 kilometres in diameter, which is considerably larger than previous interstellar visitors like Oumuamua and Borisov. While some online narratives suggest that a structure 100 times larger than 3I/ATLAS poses a threat, credible sources assert that there is no evidence to support such claims, instead emphasizing the scientific value of this interstellar object for understanding the origins of our galaxy.
First spotted hurtling through space at a velocity of 210,000 kilometres per hour, 3I/ATLAS is the third confirmed interstellar object to enter our solar system. Its closest approach to the Sun, known as perihelion, occurred on 29 October 2025 at approximately 1.4 astronomical units (about 210 million kilometres). The comet passed Mars on 3 October 2025 at a distance of 0.194 astronomical units, providing opportunities for detailed observations from missions such as HiRISE. It is set to reach its closest point to Earth on 19 December 2025, maintaining a safe distance of 1.8 astronomical units (or 270 million kilometres), with NASA confirming that there is no risk of collision.
The trajectory of 3I/ATLAS presents a rare chance for scientists to study its composition. Observations from the Hubble Space Telescope have revealed a striking blue hue, which has intrigued experts. The data collected estimates the comet’s mass at over 33 billion tons, categorizing it as ‘anomalously massive’ and challenging existing comet models. Additionally, unusual emissions of nickel have been detected, leading to discussions among astronomers about the implications for our understanding of these celestial bodies.
Harvard astrophysicist Avi Loeb has suggested that the peculiar behaviors observed might hint at an artificial origin, although he cautions that current data limitations prevent definitive conclusions. NASA continues to assert that 3I/ATLAS is a natural comet, pointing out that no radio signals have been detected, despite extensive searches.
Despite the scientific focus, sensational claims regarding a purported massive structure targeting 3I/ATLAS have proliferated on social media. These narratives often link to unverified anomalies near the Sun or speculative signals. Experts, including those from Live Science, have dismissed suggestions of alien technology, affirming that 3I/ATLAS closely resembles typical comets. An online post highlights the importance of early detection, enabling scientists to observe the comet without the need for interception efforts.
The alleged new cosmic anomaly, described in various online videos, is depicted as a colossal disc-shaped structure purportedly captured in footage from NASA’s SOHO observatory on 27 March 2023. This object is said to exhibit perfect geometric symmetry, leading to theories that it could be an interstellar energy-harvesting platform or a surveillance hub. However, these ideas are largely regarded as speculative fiction, lacking empirical evidence to support such claims.
As research continues, astronomers emphasize the necessity of relying on credible data over sensationalized narratives. The scientific community remains focused on 3I/ATLAS, eager to unlock the mysteries of its origin and the materials it brings from beyond our solar system. The ongoing study of this interstellar comet promises to deepen our understanding of the cosmos.
