Officially named 3I/ATLAS, the comet was confirmed as having originated outside of Earth's solar system on July 3, according to the European Space Agency (ESA) and NASA. It is believed to be about 20 kilometers, or over 12 miles wide, according to the ESA and traveling at about 60 kilometers, or 37 miles per second relative to the sun.

A comet has entered the Solar System from interstellar space and will pass through the inner planets later this year, NASA says.

NASA has discovered an interstellar comet that’s wandered into our backyard. The space agency spotted the quick-moving object with the sky-surveying Atlas telescope in Chile earlier this week, and confirmed it was a comet from another star system.