Two cameras were in action. One employing a 8 mm fish-eye lens, the second dslr was equipped with a 15 mm fish-eye lens holding a diffraction grating. As described in the caption below.
A cropped section of the image obtained through the 8 mm fish-eye lens. Exposing the field at the same time as the meteor was captured through the diffraction grating. Unfortunately some dew on the lens. Therefore not top image quality.
Spectrum obtained on August 21, 2015. At 01.46 local (daylight savings) time (UTC+2).
Photo details: Canon EOS 650D, Sigma 15 mm fish-eye lens, Diffraction Grating Double Axis 13,500 lines/inch Laser Spectrometer.
ISO: 3200. Exposure: 50.2 seconds.
A more close up:
A cropped version of the image above.
The northern sky was electric blue-white in the early hours of August 4, 2015 because of a beautiful display of noctilucent clouds.
Beautiful NLC structures over the mountain peaks. Here is a photo of the display taken on August 4, 2015.
Photo details: Canon EOS 650D, Sigma 50 – 500 mm, tripod, remote controller
The sky was painted in a multitude of colors on the night of March 17, 2015. The auroral show this night was pretty amazing. Here are a couple of images.
On January 26/27 2015 Asteroid 2004 BL86 had a relatively close flyby. It was only 3 times farther from us than the Moon. This asteroid (with a diameter of about 0.5 km) is the closest known flyby until 1999 AN10 which is estimated to flyby the Earth in 2027.
The asteroid is visible as a small point.
A reddish- green fireball appeared on the sky above the clouds on November 10, 2014. Image taken at about 19.33 local time. Location Ørsta, Norway. Camera details: Samyang 8 mm fisheye-lens on a Canon T3 (EOS 1100D), Iso: 800, exp: 51 seconds