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

Beyond the fact that this is the third known interstellar object to have entered our solar system, “we don’t know very much,” said Larry Denneau, co-principle investigator at Atlas, a telescope in Chile that spotted 3I/Atlas on July 1,

Late in the evening on July 1, a telescope in Chile that is part of the global, NASA-funded Asteroid Terrestrial-Impact Last Alert System (ATLAS) picked up on a new moving dot in the sky, an object traveling past the orbit of Jupiter.