... an important step in understanding the physical and chemical similarities and differences between Solar System-born and interstellar asteroids,” say Morais. These select centaurs, say Namouni and Morais, likely originated from a nearby star cluster...
... telescopes such as Pan-STARRS are powerful enough to detect objects like `Oumuamua and with estimates that interstellar asteroids pass our borders approximately once a year, it is likely that `Oumuamua will be the first in a long line of visitors...