Science

Meet 3I/Atlas: Our New Interstellar Comet, But No Need to Panic!

2025-07-07

Author: Jia

NASA has officially announced the arrival of a mesmerizing new interstellar comet, known as 3I/Atlas, that has ventured into our solar system. This dazzling celestial traveler was first detected by the Atlas telescope in Chile.

3I/Atlas marks a monumental moment as the third acknowledged interstellar object to grace our cosmic neighborhood. Thankfully, there's no cause for alarm—this comet poses no threat to Earth at all.

Paul Chodas, director of NASA's Center for Near Earth Object Studies, shared insights about the comet’s extraordinary journey: "These objects take millions of years to journey from one stellar neighborhood to another, so this majestic comet has been galivanting through the universe for potentially billions of years. We can't trace its exact origin, but it's a thrilling prospect!"

Currently located 416 million miles from the Sun, near Jupiter, 3I/Atlas is zooming through the cosmos at an astonishing speed of 37 miles per second. Its closest approach to the Sun is set for late October, during which it will glide safely between the orbits of Mars and Earth—150 million miles from us.

Astronomers around the globe are keeping a close watch on this icy wonder. Since its discovery just a few days ago, there have been over 100 observations, revealing the comet's tail and a surrounding cloud of gas and dust.

Stargazers can catch glimpses of 3I/Atlas with telescopes through September before it gets too close to the Sun. After making its spectacular passage, it will re-emerge in December, again visible from Earth.

Interestingly, early assessments suggest that this comet could be larger than its predecessors—the famed Oumuamua and 21/Borisov, possibly spanning several miles in diameter. Unlike its predecessors, 3I/Atlas is on a different trajectory and may have originated closer to the Milky Way's center.

Oumuamua became famous after its discovery in 2017 and sparked intrigue as it transitioned from being classified as an asteroid to a possible comet. Likewise, the 2019 find of 21/Borisov further heightened interest in interstellar objects.

As Chodas aptly put it, "We’ve been anticipating the arrival of interstellar visitors for decades, and now, they’re finally here. A natural wonder from another solar system—it’s truly exhilarating!"