When it comes to spotting natural phenomena, it's hard to go past Norway. From August, you'll catch the end of the midnight sun and, if you're lucky, the start of the dancing light show put on by aurora borealis. And when that's not happening you'll have your sense of perception challenged.

Here's a guide to three of Norway's more entrancing spectacles, taken from Lonely Planet's Norway guide:

Midnight sun (and polar night)

Because the Earth is tilted on its axis, polar regions are constantly facing the sun at their respective summer solstices and are tilted away from it in the winter. The Arctic and Antarctic circles, at 66° 33’ north and south latitude respectively, are the southern and northern limits of constant daylight on their longest day of the year.

The northern half of mainland Norway, as well as Svalbard and Jan Mayen island, lie north of the Arctic Circle but, even in southern Norway, the summer sun is never far below the horizon. Between late May and mid-August, nowhere in the country experiences true darkness and in Trondheim, for example, the first stars aren’t visible until mid-August.

Conversely, winters here are dark, dreary and long, with only a few hours of twilight to break the long polar nights. In Svalbard, not even a twilight glow can be seen for over a month. During this period of darkness, many people suffer from SAD syndrome, or 'seasonal affective disorder'. Not surprisingly, most northern communities make a ritual of welcoming the sun the first time it peeks above the southern horizon.

For sun timetables, head to visitnorway.com. In Svalbard this year, the midnight sun lasts until 22 August.

Aurora borealis

There are few sights as mesmerising as an undulating aurora. Although these appear in many forms – pillars, streaks, wisps and haloes of vibrating light – they’re most memorable when taking the form of pale curtains wafting on a gentle breeze. Most often, the Arctic aurora appears as a faint green or light rose but, in periods of extreme activity, can change to yellow or crimson.

The visible aurora borealis, or northern lights, are caused by streams of charged particles from the sun, called the solar wind, which are directed by the Earth’s magnetic field towards the polar regions. Because the field curves downward in a halo surrounding the magnetic poles, the charged particles are drawn earthward. Their interaction with electrons in nitrogen and oxygen atoms in the upper atmosphere releases the energy creating the visible aurora. During periods of high activity, a single auroral storm can produce a trillion watts of electricity with a current of one million amps.

The Inuit (Eskimos) call the lights arsarnerit ('to play with a ball'), as they were thought to be ancestors playing ball with a walrus skull. The Inuit also attach spiritual significance to the lights, and some believe that they represent the capering of unborn children; some consider them gifts from the dead to light the long polar nights and others see them as a storehouse of events, past and future. Norwegian folklore attributes the lights to old maids or dead maidens dancing and weaving. The lights were seen as a bad omen and a sign that God was angry, and people who
mocked the superstition risked incurring the ire of God.

The best time of year to catch the northern lights in Norway is from October to March, although you may also see them as early as August. Oddly enough, Svalbard is actually too far north to catch the greatest activity.

More information at visitnorway.com. Other good spots for aurora borealis viewing: Finland, Alaska, Canada, Greenland.

Fata morgana

If the aurora inspires wonder, the fata morgana may prompt a visit to a psychiatrist. The clear and pure Arctic air ensures that distant features do not appear out of focus. As a result, depth perception becomes impossible and the world takes on a strangely two-dimensional aspect where distances are indeterminable. Early explorers meticulously laid down on maps and charts islands, headlands and mountain ranges that were never seen again.

An amusing example of distance distortion, described in the enigmatic book Arctic Dreams by Barry Lopez, involves a Swedish explorer who was completing a description in his notebook of a craggy headland with two unusual symmetrical valley glaciers, when he discovered that he was actually looking at a walrus.

Fata morganas are apparently caused by reflections off water, ice and snow, and when combined with temperature inversions, create the illusion of solid, well-defined features where there are none. On clear days off the outermost coasts of Lofoten, Vesterålen, northern Finnmark and Svalbard, you may well observe inverted mountains or nonexistent archipelagos of craggy islands resting on the horizon. It’s difficult indeed to convince yourself, even with an accurate map, that they’re not really there!

Also unsettling are the sightings of ships, large cities and forests where there could clearly be none. Normal visibility at sea is less than 18km, but in the Arctic, sightings of islands and features hundreds of kilometres distant are frequently reported.

Read more about Norway on our destinations page.

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