The 77th Parallel North is a circle of latitude located 77 degrees north of the Earth's equatorial plane. It runs through the Arctic region, primarily over the Arctic Ocean and parts of the surrounding landmasses. This parallel is significant for geographical studies and climate research, as it marks a boundary where the polar climate becomes more pronounced. At this latitude, the sun does not set during the summer months, resulting in continuous daylight, a phenomenon known as the Midnight Sun. Conversely, during winter, the area experiences polar night, where the sun does not rise for an extended period. The 77th Parallel North is also relevant for navigation and mapping in the Arctic, influencing the routes taken by explorers and researchers.