Astronomers have been fascinated after spotting an object earlier this year that came from interstellar space as is now hurtling through our inner solar system. Since then, they've been using powerful telescopes to study the mysterious object, trying to understand its unusual composition and exact origins. Most agree that it's probably a comet, albeit an unusual one, though at least one has posited that it could be a remnant of an advanced extraterrestrial civilization — a colorful claim, but one that NASA has disputed as a flight of fancy. Regardless, it's an interesting visitor. In a paper presented at the...