Confirmed as an alien comet, new observations have given us a much better idea of how large this interstellar object actually is.

Astronomers using the Hubble Space Telescope have observed 3I/ATLAS, only the third known object from outside our Solar System to visit our neighborhood.

Hubble telescope captures third interstellar visitor 3I/ATLAS showing active dust coma racing through solar system.

Hubble also captured a dust plume ejected from the Sun-warmed side of the comet and a hint of a dust tail streaming away from the nucleus.

U-M astronomers are helping study a fast-moving, ancient, and massive comet that formed beyond our galaxy. A group of astronomers from around the world, including a doctoral student from the University of Michigan,