The first interstellar object to be confirmed was 1I/2017 U1, more commonly known as 'Oumuamua. It was discovered with the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) and ...

Turns out, it came from another star system. This is the first time humanity has observed an interstellar object. Astronomers discovered it on Oct. 19. At first, they thought it was a comet.

Oumuamua is the first interstellar object ever detected in our solar system. Astronomers discovered it in 2017 with the Pan-STARRS1 telescope. And like all grand discoveries, it has raised more ...

Back in 2017, something very strange passed through our solar system. It was the first interstellar object ever to be spotted by mankind, and it was unlike anything astronomers had ever seen.

Caption This artist's impression shows the first interstellar object discovered in the Solar System, `Oumuamua. Observations made with the NASA/ESA Hubble Space Telescope and others show that the ...

The Gemini Observatory in Hawai'i has captured a new and revealing image of a mysterious object that's likely the first interstellar comet humans have ever detected. The comet, called C/2019 Q4 ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

Astronomers initially called it "1I/2017 U1" - with the "I" standing for interstellar, since the object's trajectory strongly suggested it came from another star system. It represented the first ...