space and towards our solar system as a comet.The alien object was designated as a comet Wednesday, June 23, just a week after it was first observed as a tiny, moving dot in archival images from the Dark Energy Camera at the Cerro Tololo Inter-American Observatory in Chile.It's so big that experts had previously thought the comet was a minor planet and has the largest comet nucleus ever seen.The comet will now be known as Comet C/2014 UN271, or Bernardinelli-Bernstein after its discoverers, University of Pennsylvania graduate student Pedro Bernardinelli and astronomer Gary Bernstein.
It is thought it could be from the farthest reaches of the Solar System about half a light-year from the Sun.Long-period comets take more than 200 years to.
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