Request a Copy of your Certificate of Naturalization. The Certificate of United States Naturalization Guide was developed to help naturalized U.S. citizens complete and file their own requests for a copy of their Certificate of Naturalization.
A polar day refers to a day when the sun does not set for 24 hours. This occurs because the top of the earth tilts toward the sun during one half of the year. Areas in the very northern and very southern parts of the globe are the only regions that experience both polar days and polar nights.
Seasons are caused by the fact that the Earth is tilted on its axis by 23.5Â°. The tilt's orientation with respect to space does not change during the year; thus, the Northern Hemisphere is tilted toward the sun in June and away from the sun in December, as illustrated in the graphic below. The Relationship Between Length of Day and Temperature