It Came From Outside Our Solar System, and It Might Be Big

Kenneth ChangScience Space and Astronomy, Asteroids, Comets, Solar System, Stars and Galaxies, Telescopes and Observatories A11pI3Z is only the third interstellar visitor to be discovered, and astronomers can’t say yet whether it is a comet or a rocky body. https://ift.tt/OLqQxdg