In a breathtaking astronomical discovery, NASA scientists have identified a massive interstellar comet—approximately the size of Manhattan—barreling through our solar system. This rare cosmic traveler, officially named 3I/ATLAS, is only the third known interstellar object to ever be observed visiting our celestial neighborhood.

Spotted by NASA’s space surveillance systems, the comet is believed to have originated from a distant star system beyond our own. Measuring roughly 12 miles (19 kilometers) wide, its immense size and speed have both amazed and puzzled astronomers.

“This is a once-in-a-generation discovery,” said a NASA spokesperson. “Not only is its origin completely alien to our solar system, but its behavior and chemical composition might hold clues to the formation of other planetary systems.”

3I/ATLAS is expected to make its closest approach to the Sun in October 2025, giving scientists a rare opportunity to study the structure and evolution of interstellar objects.

While there is no threat to Earth, the discovery ignites fresh curiosity about what else may be lurking beyond our solar system—and what secrets such celestial visitors might reveal about the universe’s deep past.

This cosmic encounter is yet another reminder of how much more we have to learn about the vast, mysterious space that surrounds us.