You know that here with us in winter the day and the course of the sun are brief; for so short is the sun’s path that it passes through but a single region of the sky, and then only where the sun has considerable strength. But in many places the sun is not to be seen during a large part of winter, for example in Halogaland,[173] as we have not only heard tell but have often and constantly learned and observed with our own eyes. For we know definitely that from about November 10 to January 10 there never comes a day so bright up north in Vaag or at Andenes[174] in Halogaland but that the stars in the sky are visible at midday as at midnight. And although the days have so much light that the stars cannot be seen, nevertheless, in most of the places that we have mentioned the sun remains invisible till January 23. But after that date the days lengthen and the sun mounts so rapidly, that beginning with April 6 daylight does not disappear before September 17, all the intervening time being one continuous day, for daylight never fails in all that while. From this you may safely conclude that, though the sun is hotter in the southern lands that we spoke of earlier, its course waxes and mounts more slowly where the night, even at mid-summer, is deep and long and dark, and where there is never a time in the whole twelvemonth when day does not fail. But in Halogaland, as I have just said, there is no day in winter and stars are visible at midday when the day should be brightest; later, however, when the days begin to lengthen, they grow so rapidly that early in spring daylight begins to tarry all the night and continues till much of the autumn is past.
Halogaland, the modern _Nordland_, is that part of Norway lying north of the sixty-fifth parallel.
Vaag and Andenes are points in the Lofoten Islands; their latitudes are 68° 12´ 35″ and 69° 18´ 50″ respectively.
There remains one more proof which will seem very clear to you. You know that in those localities in Halogaland that we have just mentioned the sun about May 15 begins to shine with the same brightness by night as by day, never setting either at night or during the day but shining continuously in this manner and with this brightness, except when its light is obscured by clouds, even to July 25. Now you know that the sun is only moderately warm in Halogaland, and that there is but a little time in summer when it gives sufficient warmth. Still, there it is with its blazing disk about as long as we have just stated, and it maintains the daylight about as long as we have just computed. But neither fact is true of the southlands, though the sun is hotter there. Now these facts give evidence that the sun is more distant here, for it gives less heat. They also testify to the waxing of its course, for, since its light is as bright by night as by day, its path must lengthen more rapidly here. But yonder it waxes less and more slowly, for there the night has its prescribed period both for length and darkness in summer as well as in winter.