ʻOumuamua
Oumuamua is the first known interstellar object detected passing through the Solar System. Formally designated 1I2017 U1, it was discovered by Robert Weryk using the Pan-STARRS telescope at Haleakalā Observatory, Hawaii, on 19 October 2017. It is a small object estimated to be between 100 and 1,000 metres long, with its width and thickness both estimated to range between 35 and...