Thor is a mythical god of thunder in Norse mythology. He is the son of Odin, the chief god of Norse mythology, and is associated with strength, power, and protection. Thor is often depicted as wielding a hammer called Mjölnir, which he uses to protect Asgard, the realm of the gods. He is also known for his battles with giants and other creatures. Thor is a popular figure in modern culture, appearing in many films, television shows, and comic books.