Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it appears to be a comet and is thought to have flown in from the direction of the constellation Sagittarius,

The Interstellar Boundary Explorer (IBEX) is a small satellite already orbiting Earth. IBEX has special instruments gathering data to create the first map of the boundary of interstellar space. NASA is preparing to launch the Interstellar Mapping and Acceleration Probe (IMAP) in 2025.

These things take millions of years to go from one stellar neighborhood to another, so this thing has likely been traveling through space for hundreds of millions of years, even billions of