Comet 3I/ATLAS is much bigger than previously thought, weighing a record 33 billion tons and measuring at least 3 miles across, according to theoretical physicist Avi Loeb. He's warned it could be of "alien origin" and wants the U.S. to be on alert for a "Black Swan event." MORE: https://www.newsnationnow.com/space/ | NewsNation

On October 3, Comet 3I/ATLAS will make its closest approach to Mars. ("Close" being about 17 million miles from the surface 🙃) Use Eyes on the Solar System to follow the interstellar comet's journey and see where else it's headed. go.nasa.gov/4goaV2t | NASA Jet Propulsion Laboratory