New Images of 3I/ATLAS Ends Alien Spacecraft Debate but Gives Rise to a Brand New Theory

Threeey Atlas: The Third Confirmed Interstellar Visitor

In May 2025, astronomers spotted a faint speck of light that would later be named Threeey Atlas, the third confirmed interstellar object to enter our solar system. It was first detected using a telescope at Rio Ortado, Chile, appearing as a tiny point of light moving against the background stars. Over 100 observations have been collected, giving scientists a detailed understanding of its trajectory. We know it originated from outside our solar system and is currently within Jupiter’s orbit, moving toward its closest approach to the Sun at the end of October 2025.

The Mystery of Interstellar Objects

Like its predecessors, Oumuamua and Borosov, Threeey Atlas traveled millions of years through interstellar space before entering our solar system. Since its discovery, scientists have debated its true nature.

Are these objects merely comets ejected from alien star systems, or fragments of failed planets drifting indefinitely between stars? Harvard astrophysicist Avi Loeb has proposed a more radical idea: some interstellar visitors, including Threeey Atlas, may be artificial, potentially alien probes or reconnaissance missions.

Loeb points out that Threeey Atlas’ path lies unusually close to the orbital plane of the planets, passing near Venus, Mars, and Jupiter. He calculates that the chance of such alignment occurring randomly is just 0.005%. Furthermore, the object’s perihelion will occur when it is hidden from Earth’s view, which could indicate intentional concealment.

Strange Observations

Images reveal an unusual feature: a glow ahead of the object toward the Sun, rather than a typical cometary tail trailing behind. Its shape is cigar-like, approximately ten times longer than it is wide.

The object’s composition is also puzzling. It has a surrounding gas cloud mainly of carbon dioxide, and its solid matter contains nickel without iron. In nature, nickel is usually accompanied by iron, while nickel alloys without iron are typically industrially produced. Could this indicate a technological origin?

NASA, however, maintains a natural explanation, noting that the object is active. Its nucleus is surrounded by a coma, a cloud of gas and dust indicating that it is indeed a comet.

A Cosmic Seed?

Beyond identifying what Threeey Atlas is, some scientists ask why it exists. Astrophysicist Suzanne Falsner proposes a bold idea: Threeey Atlas could be a “planet-making seed.”

In young solar systems, planets form as tiny dust grains clump together into pebbles, then boulders, and eventually planetesimals, the building blocks of planets. These can grow large enough to attract more material.

However, protoplanetary discs last only a few million years before their gas is blown away, often too short to form massive planets like Jupiter or Saturn. Falsner suggests that if an interstellar object enters the disc, it can serve as a ready-made core, accelerating planet formation.

Her simulations show that massive stars are better at capturing interstellar objects, which aligns with observations that gas giants are more common around bigger stars. If this is true, interstellar objects like Oumuamua, Borosov, and Threeey Atlas could ignite planetary systems, possibly even influencing the early history of our own solar system.

Tracking Threeey Atlas

Interstellar objects are notoriously difficult to study. They appear suddenly, move quickly, and vanish into darkness. But in 2025, astronomers detected Threeey Atlas well in advance, giving us an unprecedented opportunity to track it.

ESA plans to use Mars Express and the ExoMars Trace Gas Orbiter to observe the object as it passes near Mars in October, capturing images and data never before obtained from an interstellar visitor.

Key Milestones

Several milestones have been marked as Threeey Atlas travels through the solar system:

October 3, 2025 – Mars Flyby: The object will pass 18 million miles from Mars. Orbiting spacecraft may observe its dusty coma glowing faintly pink in the Martian dawn.
October 29, 2025 – Perihelion: Threeey Atlas will pass 1.36 AU from the Sun at a speed of ~152,000 mph. Earth-based telescopes will lose sight due to solar glare, but spacecraft on Mars and at L1 will monitor erupting vapor jets.
December 19, 2025 – Earth Distance Check: The object will pass Earth at 170 million miles. While too far for naked-eye viewing, telescopes like James Webb can analyze its coma for isotopic clues.
March 16, 2026 – Jupiter Flyby: Threeey Atlas will pass 33 million miles above Jupiter. If approved, Juno could adjust its trajectory to sample dust, providing a rare close-up of material formed beyond the Sun.

After these encounters, Threeey Atlas will return to interstellar space, leaving scientists with terabytes of data and more questions than answers.

Conclusion

Threeey Atlas offers a rare opportunity to study an interstellar object in detail. It could reveal insights into planet formation, solar system history, and the broader cosmos. Its mysterious nature—whether natural or artificial—reminds us how much we still have to learn about the universe.