interstellar objects – Only three interstellar travelers have been discovered by astronomers so far: Oumuamua (2017), comet 2I/Borisov (2019), and the most recent 3I/ATLAS (2025). To evaluate the risks and impacts on Earth, a recent study has modeled their trajectories.

Despite the extreme rarity of such events – NASA says 3I/ATLAS poses no threat to Earth – researchers have discovered interesting trends. According to the survey, interstellar objects mainly come from the galactic plane and the direction of the Sun’s motion. Modeling impact potential According to the new study, the Michigan State team simulated ~10^10 hypothetical interstellar objects (ISOs), which yield about 10^4 crossing Earth’s orbit.

They found double the potential impacts from two directions – the solar vertex and the galactic plane. Slow objects easily held by the Sun’s gravity dominate this group.

Models suggest potential impacts will be smaller at lower latitudes near the equator and slightly larger in the Northern Hemisphere. The researchers do not explicitly predict any actual impact rates; Their work merely outlines relative risk patterns for future surveys. Known Visitors and Risks Interstellar objects are cosmic bodies traveling through our solar system.

So far they include comets such as ‘Oumuamua and Borisov as visitors. Much else has gone missing in Earth’s billions of years of history.

For perspective, one analysis estimates that only 1–10 ISO-sized objects (≈100 meters wide) have hit Earth over billions of years. Some may also have created ancient craters, such as the Vredefort Formation in South Africa. Space agencies emphasize that these objects behave like normal comets, not alien spacecraft.

It is believed that the chances of ISO hitting Earth are very low – astronomers estimate the probability of such an event in any human lifetime to be extremely low.