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A Space Object, C/2019 Q4, First Spotted On August 30, 2019, Is Now Thought To Be A Comet. And The Data Collected, So Far, Is Strongly Indicating That It May Have Come From Another Solar System. Once Data Is Finalized To Be True, It May Be The First Comet To Have Come From An Unknown Point In Another Solar System.

Newly Discovered Comet Is Likely Interstellar Visitor

https://www.jpl.nasa.gov/news/newly-discovered-comet-is-likely-interstellar-visitor

Comet C/2019 Q4 (Borisov) has excited the astronomical community because it appears to have originated from outside the solar system.