Final answer:
Alaska is known as "The Last Frontier" or "The Land of the Midnight Sun." This refers to the fact that north of the Arctic Circle, the Sun can be seen for a full 24-hour period during the summer solstice due to the Earth's axis tilt.
Step-by-step explanation:
The state nicknamed "The Last Frontier", also known as "The Land of the Midnight Sun", is Alaska. This nickname is due to its vast wilderness and location in the extreme northwest of North America, which provides an impressive sight where the sun can be seen at midnight during the summer months.
From an astronomical perspective, the "Land of the Midnight Sun" refers to regions north of the Arctic Circle. This phenomenon occurs because the tilt of the Earth's axis allows for a full 24-hour period of sunlight during the summer solstice. Therefore, at certain times of the year, the Sun is visible at midnight in these regions.
The Arctic Circle is the southernmost latitude where this phenomenon can happen. The continuous daylight results from the Earth's tilt in relation to its orbit around the Sun, leading to extended days during summer and long nights during winter in these high latitudes.