The bright light at the center is the interstellar comet 3I/ATLAS (Credit: noirlab.edu/ CC-BY-SA-4.0/ Wikipedia Commons)A rare comet from another star system is speeding through our solar system, giving astronomers a unique chance to study an interstellar visitor up close. This indicates it came from a star system very different from our own. This makes it the oldest interstellar comet ever spotted. 3I/ATLAS is the largest and fastest interstellar comet ever spotted (Credit: noirlab.edu/ CC-BY-SA-4.0)In the most recent image captured by two sky photographers on September 7, 2025, the comet appears bright green. NASA astronomer Teddy Kareta says that patience will be key to spotting the rare comet.