A "Captain's Log" is a record kept by the captain of a ship or spacecraft. It documents important events, navigational details, and observations made during a voyage. This log serves as an official account of the journey, providing valuable information for future reference and legal purposes. In many stories, such as those in the Star Trek franchise, the captain's log is used to share insights and experiences with the crew and sometimes with the audience. It often includes entries about encounters with alien species, challenges faced, and discoveries made during exploration.