Astronomers have discovered the third known interstellar object, 3I/ATLAS, entering our solar system.
According to NASA, 3I/ATLAS is classified as interstellar due to its hyperbolic orbital path, meaning it does not follow a closed orbit around the Sun.
"When the orbit of 3I/ATLAS is traced into the past, the comet clearly originates from outside our solar system,"
Initial observations indicate that the object is a coma, a cloud of gas and dust, rather than a large asteroid. However, its speed of 130,000mph suggests it is not gravitationally bound by the Sun.
"No one knows where the comet came from,"
said David Jewitt, science team leader for the Hubble observations, comparing the brief glimpse of the object to seeing a rifle bullet for a thousandth of a second.
Author's summary: A Harvard scientist describes a mysterious object approaching Earth as behaving like an "extraterrestrial artefact".