The third object coming from outside our solar system that is observed made its closest approach to the Sun this week. In ...

Harvard astrophysicist Avi Loeb proposes that interstellar object 3I/ATLAS could be made of antimatter—"the most efficient fuel"—while NASA scientists remain sceptical.

Harvard physicist Avi Loeb has drawn attention for his take on the interstellar object 3I/ATLAS, which was officially observed on July 1, 2025. According to NASA, “comet” 3I/ATLAS is the “third known ...

For decades, astronomers have only glimpsed interstellar visitors through the powerful eyes of telescopes. Now, a team of ...