Astronomers discovered 3I/ATLAS, a 10–20 km-wide interstellar comet racing into the solar system. It will reach perihelion in ...

Solar systems mostly keep to themselves. What’s ours is ours and what’s not is not. Stars are simply too far from each ...

Beyond the fact that this is the third known interstellar object to have entered our solar system, “we don’t know very much,” ...

Astronomers are tracking a newly spotted comet hailing from parts unknown, only the third time such an interstellar object ...

Based on the comet's brightness and current distance — it's located just inside Jupiter's orbit — scientists estimate its ...