Interstellar Comet 3I/ATLAS Approaches Perihelion Amid Speculation
As interstellar comet 3I/ATLAS nears its closest approach to the Sun, scientists observe its behavior, while some speculate on its origins.
Discovered on July 1, 2025, by the Asteroid Terrestrial-impact Last Alert System (ATLAS) in Chile, interstellar comet 3I/ATLAS is the third known object from beyond our solar system, following 1I/'Oumuamua and 2I/Borisov.
The comet is set to reach perihelion on October 30, 2025, coming closest to the Sun within Mars' orbit. As it approaches, 3I/ATLAS has exhibited significant outgassing, releasing approximately 88 pounds (40 kilograms) of water per second while still 2.9 astronomical units from the Sun.
Harvard astronomer Avi Loeb has suggested the possibility that 3I/ATLAS could be of artificial origin, proposing that it might perform an "Oberth maneuver" near the Sun to alter its trajectory. However, this hypothesis is met with skepticism within the scientific community. Tom Statler, NASA’s lead scientist for solar system small bodies, stated, "It looks like a comet. It does comet things. It very, very strongly resembles, in just about every way, the comets that we know."
Observations from spacecraft orbiting Mars and other missions are ongoing to monitor 3I/ATLAS's behavior as it nears the Sun. These studies aim to enhance our understanding of interstellar objects and their characteristics.