Is Something Coming? Scientists Warn Manhattan-Sized Object Could Be Alien Spacecraft Preparing to Attack Earth

A massive object the size of Manhattan is hurtling through our Solar System and a bold new theory suggests it might be more than just a space rock. In a recent draft research paper published Tuesday, a team led by Harvard astrophysicist Avi Loeb proposes that this mysterious visitor, named 3I/ATLAS, could actually be a form of alien technology. Even more startling: they claim it may be preparing for a surprise attack on Earth this November.

3I/ATLAS is only the third interstellar object ever detected passing through our Solar System. But unlike its predecessors, its orbit appears suspiciously calculated. The researchers argue that its current path could allow it to slip past Earth undetected. As it approaches the Sun’s perihelion (its closest point) in late November, it will be completely out of view from Earth, creating a perfect opportunity for a covert maneuver slowing down and anchoring itself within our Solar System. The hypothesis suggests that such a move could allow it to remain hidden while preparing for a potential assault.

The paper emphasizes that this scenario is speculative and primarily intended as a theoretical exercise—the authors do not claim this is definitively an alien invasion plan. Still, they argue the object’s strange behavior deserves deeper investigation. And with less than 0.005% chance of its close planetary flybys being coincidental, some researchers believe the idea of intelligent design can’t be entirely ruled out.

Whether the theory proves valid or not, 3I/ATLAS has captured the imagination of scientists and skywatchers alike. If nothing else, it reminds us that the cosmos is far from quiet and occasionally, it throws us questions we never expected to ask.

Credit: Research based on a July 2025 draft scientific paper co-authored by Harvard astrophysicist Avi Loeb; summary compiled from astrophysics news and interstellar object tracking databases.

I think that it is very impressive ancient spacecraft of aliens. 
Probably, it's non-functional currently, but the shape proportion makes to think so.