Via Today's Zaman:
Egyptian Islamic theologian Yusuf al-Qaradawi will live in Norway for a set period of time in order to determine prayer times for Muslims in the world’s polar regions.
Qaradawi and his team will work to determine the five daily Muslim prayer times, the calculation of which are determined by the position of the sun, in a region where the sun does not rise and set as regularly as it does in other parts of the world. Due to such factors as the rotation of the earth, the revolution of the earth around the sun, the tilt of the earth’s axis, the various latitudes of the earth’s locations and daylight saving time, the “times” (according to the clock) for these prayers change from day to day and depending on the location.
(source)
