
Jan. 20, 2010- Per-Arne Mikalsen, a photographer, has taken an “object” on his photograph that couldn’t be identified while he was photographing a vast aurora erupting over the northern Norwegian town of Andenes.
Although Mikalsen had taken several images at the same location, just one photo showed a mysterious green parachute-like object hanging with the main aurora. (This time, it appears that the Russian military was not involved in the making of this strange shape in the sky.)
Because solar activity is on the increase, aurora spotters have many opportunities to see the Northern Lights. On this particular night the aurora was intense, stretching toward the southern latitudes of Norway.
At first it seemed easy to dismiss the object as a lens flare or a spot on the camera lens, but after further study it became clear that the answer wasn’t that simple. Mikalsen have been familiar to aurorae of all shapes and sizes, but he’d never before seen a structure like this hanging in the sky.
“I have been working the Andøya Rocket Range for 25 years (the 20 last years in the management) and I have become more and more fascinated by the aurora,” Mikalsen told Discovery News. “Photography is a hobby for me.”
So what could it be? In correspondence with Truls Lynne Hansen, lead scientist at the Tromsø Geophysical Observatory, he doubts that the mystery object can be explained by a technical fault.
“Usually such aberrations appear when there is a small and intense source of light in the field of view, or at least so close that the light from it hits the lens,” according to Hansen.
“Additionally the color of the ‘phenomenon’ is the same as the color in the aurora, the auroral green line from atomic oxygen,” Hansen continued, “so the ‘phenomenon’ is either a genuine auroral feature or a reflection of auroral light somewhere in space.”
The structured shape of the phenomenon, plus its distance from any light sources, seems to indicate that this isn’t an equipment problem. There is also no known aurora that could do this naturally. So that leaves the “reflection from space” argument. So, what else in space that could possibly reflect the green light being emitted by the aurora?
“I agree with Pal Brekke, Senior Advisor at the Norwegian Space Centre, that a reflection from a satellite is a candidate,” said Hansen. “It reminds of the so-called ‘Iridium flares’ — reflections of sunlight from the regularly shaped Iridium satellites.”
Satellite flares are well known by astronomers. As a satellite passes overhead, the conditions may be right for the spacecraft’s solar panels or antennae to reflect sunlight down to the ground. The result is a short-lived burst of light, known as a “flare.”
via: news.discovery.com
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