The “Wall of Fire” and the Edge of the Solar System Launched in 1977, NASA’s Voyager probes were designed to explore the edge of the Solar System and the interstellar medium. After decades ...

NASA is preparing to map the boundary where the solar wind meets interstellar space in its Interstellar Mapping and Acceleration Probe, set for launch sometime after September of this year.

The near-Earth asteroid Bennu contains stardust that is older than the solar system and clues about its violent history, ...

It will stay roughly 150 million miles away. That's about 1.5 times the distance from Earth to the sun. This is only the third confirmed interstellar object soaring through the solar system.

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our solar system—only the third ever spotted, though scientists suspect many more may slip past unnoticed.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed. The object -- likely a comet -- was first detected in data collected between ...

Harvard astrophysicist Avi Loeb has cowritten a research paper speculating whether the comet 3I/ATLAS is in fact "hostile" ...

It is only the third interstellar object ever spotted in our Solar System, although many others have probably passed unnoticed. The object gained an official name, 3I/ATLAS or C/2025 N1, on Wednesday.

Cigar-shaped interstellar object Oumuamua thought to be from Oort cloud. Harvard astronomer Avi Loeb theorized in 2017 that the object could have alien origins, though later research suggested it ...