ꞌOumuamua — an interstellar visitor

The trajectory of the asteroid ꞌOumuamua, the first interstellar object detected in our solar system. ꞌOumuamua’s visit is brief, lasting only a few months, but it provides food for thought: what other such objects have passed close by Earth and what might they have brought hither from across the vast cosmic gulfs. Arrhenius’s pan-spermia hypothesis comes to mind — link >>>

Artistic depiction of ꞌOumuamua. Picture by European Southern Observatory