This is only the third interstellar comet scientists have observed. Its extreme brightening, unusual composition, and intense gas activity offer a rare glimpse into materials and behaviors from outside our solar system, and a reminder that the universe is full of surprises.

Spacecraft have revealed that the comet—which one scientist suggests could be an alien spacecraft—is now "distinctly bluer than the Sun."

As 3I/Atlas neared its closest point to the sun in its orbit, the internet was abuzz with curiosity about the comet.

Astronomers have identified Comet 3I/ATLAS as an interstellar object, making it only the third confirmed visitor from outside our solar system, according to NASA.<br /><br />The comet is travelling on a hyperbolic trajectory,

Astronomers detect unexplained acceleration in interstellar object 3I/ATLAS as Avi Loeb suggests an artificial 'engine' can't yet be ruled out.

The comet could be older than our solar system. The comet is also distinct because nickel vapor was detected in the gas surrounding it.