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The Aurora Borealis, the spectacular Northern Lights turn the sky green and purple above Kvaloya island at Tromso in the Arctic Circle in Northern Norway

Aurora Borealis spectacular Northern Lights green and purple curtain effect and Venus star at Grotfjord, Kvaloya island, Tromso, Arctic Circle, Northern Norway

The Aurora Borealis, the spectacular Northern Lights fill the sky with dazzling green light above Kvaloya island at Tromso in the Arctic Circle in Northern Norway

Aurora Borealis spectacular Northern Lights green and purple curtain effect and Venus star at Grotfjord, Kvaloya island, Tromso, Arctic Circle, Northern Norway

The Aurora Borealis, the spectacular Northern Lights fill the sky with dazzling green light above Kvaloya island at Tromso in the Arctic Circle in Northern Norway

The Aurora Borealis, the spectacular Northern Lights fill the sky with dazzling green light above Kvaloya island at Tromso in the Arctic Circle in Northern Norway

The Aurora Borealis spectacular Northern Lights and Venus star at Grotfjord, Kvaloya island, Tromso in the Arctic Circle, Northern Norway

Aurora Borealis spectacular Northern Lights green and purple curtain effect and Venus star at Grotfjord, Kvaloya island, Tromso, Arctic Circle, Northern Norway

A demo image with the Orion 80mm CF Apo and Celestron AVX mount, with 3 x 8 minute and 3 x 6 minutes, at ISO 1600 with Canon 6D MkII plus shorter 3 x 2 minute and 3 x 1 minute exposures blended in with luminosity masks. Guided with the Orion Starshoot and Orion finderscope, using PHD2, with a lot of wild excursions in the guiding.

Comet Hartley 2 near the Pacman Nebula, NGC 281, in Cassiopeia. Stack of 4 x 6 minute exposures at ISO 1600 with Canon 5D MkII on A&M 105mm apo refractor at f/4.8 with Borg reducer/flattener. Bright star is Alpha Cas, Schedar. Autoguided with Celestron NexGuide autoguider. However, image of comet core is from only one exposure to minimize trailing from this fast-moving comet.

M33, the Triangulum Spiral, a dwarf spiral in the Local Group. This is a 6-image stack of 12-minute exposures with the Canon 7D at ISO 800 on the 130mm Astro-Physics apo refractor at f/6 on AP 600E mount and SBIG SG4 autoguider. Poor seeing bloated star images somewhat.

Nebulosity in the heart of Cygnus the Swan, including the North America Nebula and Pelican Nebula at left (NGC 7000 and IC 5070) and Gamma Cygni complex at right (IC 1318). The Crescent Nebula (NGC 6888) is at lower right. This is a stack of 5 x 4 minute exposures at f/2 with the 135mm lens and modified Canon 5D MkII at ISO 800, plus another three similar exposure images but taken thru the Kenko Softon filter for the star glows. Taken from home Sept 10, 2013.

A session shooting deep-sky objects in the rural backyard in Alberta, on a chilly November night, November 8, 2018. I was using the Celestron 8 HD tube assembly on the Astro-Physics Mach One mount, and was shooting Messier 27 with the Canon 6 D MkII. I shot this image with the Sony a7III and Venus Optics 15mm lens at f/2 focused on the foreground.

Concept of large blue planet with two satellite moons orbiting and a distant blue star panoramic. Some elements sourced from NASA public Domain.

Earth from space showing a sunrise with a moon in the distance panoramic. Some elements sourced from NASA public Domain.

Church of Archangel Michael, Byzantine church, icon, Unesco World Heritage Site, Pedhoulas, Troodos Mountains, Cyprus, Greece, Europe

Panagia Forviotissa Asinou Church, Byzantine church, icon, Troodos Mountains, Cyprus, Greece, Europe

The image depicts the Northern Lights over mountains with a starry night sky and a serene lake in the foreground, Panorama shot, Canadian Rockies, Alberta, Canada, North America

Satellite in front of the globe with Europe, symbolic image Galileo navigation system, overhead intelligence, data transmission

Symbolic image, migration, defence against refugees wanting to enter the EU, barbed wire overarches the stars of the EU flag against a blue sky, border, border fence

Black Feather Star (Himerometra Bartschi) and Gorgonian Sea Fan (Subergorgia Mollis) underwater, Palau

Black Feather Star (Himerometra Bartschi) and Gorgonian Sea Fan (Subergorgia Mollis) underwater, Palau

Bastions proctecting the Portas de Olivenca. Fort Santa Luzia, the greatest preserved fortification of the 17th century worldwide. Elvas in the Alentejo close to the spanish border. Elvas is listed as UNESCO world heritage. Europe, Southern Europe, Portugal, March

View over the town with the fortifications of Fort Santa Luzia, the greatest preserved fortification worldwide dating back to the 17th century.Elvas in the Alentejo close to the spanish border. Elvas is listed as UNESCO world heritage. Europe, Southern Europe, Portugal, March

Silhouette of backpacker standing against starry night sky and Milky Way galaxy visible from inside of pitched tent, New South Wales, Australia

Close-up detail of a crown of thorns starfish (Acanthaster planci); Maui, Hawaii, United States of America

Low angle view of Space Needle, ferris wheel and carousel under night sky, Seattle, Washington, United States

The Northern Lights in the night sky, the Aurora borealis above a calm lake, Two people by a fire on the lake shore, Canada

Turn Here, yellow traffic sign with arrow, on a gantry with a silver star shape, United States of America

A landscape shot at night, silhouetted trees in the foreground and the Milky Way and stars in the background, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

PANAMIC CUSHION STAR, PENTACERASTER CUMMUNGI, Ecuador, South America, Gal?pagos, Galapagos, Island, Pacific Ocean