A respected Harvard astrophysicist has shared new claims about the mysterious interstellar object in our Solar System, saying there are signs it is not an ordinary comet.
A prominent Harvard astrophysicist has claimed that a mysterious object moving through our solar system could be a nuclear-powered spacecraft.
Professor Avi Loeb, director of the Galileo Project, which hunts for signs of extraterrestrial intelligence... [4818 chars]