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    Canadian Space Agency astronaut Chris Hadfield uploaded this photo on Feb. 11, writing, "Tonight's finale: Northern Lights - recent aurora in green and red waves, USA and Canada below, the universe above."

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    Canadian Space Agency astronaut Chris Hadfield uploaded this photo on Feb. 4 from aboard the International Space Station and tweeted, "It's a bird, it's a plane, it's ... a river in South America. pic.twitter.com/pzBKwgwu"

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    Chris Hadfield uploaded this photo on Feb. 1 and wrote, "Where the Mississippi enters the Gulf of Mexico. The soil of America's heartland forming a vast, deep delta. pic.twitter.com/Dctu8ipH"

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    Chris Hadfield uploaded this photo on Feb. 1 and wrote, "Tonight's finale: The Andes mountains have an unbelievable richness of colour and texture when viewed from Earth orbit. pic.twitter.com/XQSSF4qM"

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    Chris Hadfield uploaded this photo on Jan. 24 and tweeted, "Tonight's finale: Australia. Jackson Pollock would have been even further inspired by seeing the Outback from orbit. pic.twitter.com/UHtp6lqp"

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    Chris Hadfield uploaded this photo on Feb. 2 and wrote, "Tonight's finale: This morning, over Africa, my breath was taken away. pic.twitter.com/0JefYKzo"

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    On Jan. 23, Chris Hadfield uploaded this photo and tweeted, "Deserts appear as brushstrokes of art. Even as I click the shutter it's hard to believe what I see. pic.twitter.com/ByAJvKYb"

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    Chris Hadfield uploaded this photo on Feb. 2 and wrote, "Countryside like alligator hide in South America. pic.twitter.com/bXNbyqB2"

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    Chris Hadfield uploaded this photo on Jan. 24 and wrote, "The Golden Gate Bridge from space, and if you look closely, its shadow. pic.twitter.com/lz4HEoMb"

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    On Jan. 23, Chris Hadfield uploaded this photo and tweeted, "If you blow on the weightless sphere of water it distorts, and creates a floating Fun House mirror. pic.twitter.com/gDEdfj7a"

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    On Jan. 25, Chris Hadfield uploaded this photo and tweeted, "New York City shining by night. Central Park is visible from space, and maybe even the light on the Statue of Liberty. pic.twitter.com/5g9U5U5F"

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    On Jan. 23, Chris Hadfield uploaded this photo and wrote, "The Australian Outback immediately looks like nowhere else. pic.twitter.com/hzrI3FeN"

  • AstroMarshburn/Twitter
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    Thomas H. Marshburn uploaded this photo on Jan. 23 and tweeted, "This landmark cleaving the Earth's crust is easy to spot from space - the Grand Canyon pic.twitter.com/zmVw6NSe"

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    On Jan. 22, Chris Hadfield uploaded this photo and tweeted, "Tonight's finale: Sun glinting off the Missouri waters, all the way beyond the horizon. pic.twitter.com/0FQa1Fo5"

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    Chris Hadfield uploaded this photo on Jan. 22 and wrote, "A snowstorm left a clear divide in the Southwestern US in January. A natural yin and yang on the prairie. pic.twitter.com/pxc9PNWT"

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    On Jan. 6, Chris Hadfield captured this photo and tweeted, "Volcanoes look dramatic at dawn. They startled me when I spotted them through the lens. pic.twitter.com/n8M1Pj1D"

  • Astro_Ron/Twitter
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    Ron Garan tweeted this photo, taken by Yuri Malenchenko, on Dec. 8, 2012, and wrote, "I never got a good shot of Mt. #Everest #FromSpace RT @PC0101 http://twitpic.com/bk9tpf  - Picture taken on 20121109, 095717 GMT; 800-mm lens." Although Malenchenko and Garan believed the photo depicted Mount Everest, NASA later retracted that claim. The space agency instead says the photo portrays the Indian mountain Saser Muztagh.

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    Thomas H. Marshburn snapped this shot and tweeted, "Glorious shoreline on the Red Sea – we keep lists of post-flight places to visit! pic.twitter.com/DzwBJ8nN"

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    Chris Hadfield uploaded this photo and tweeted, "Glacier tongues in the Himalayas. pic.twitter.com/A9xe7AfG"

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    On Jan. 11 Thomas H. Marshburn uploaded this photo and wrote, "Awoke this morning to see a volcano on Kyushu Island in S Japan. pic.twitter.com/PpLRcCda"

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    Chris Hadfield tweeted this photo and wrote, "Humans need straight lines, nature doesn't. Indecisive river and orderly farmers, central Asia. pic.twitter.com/BIL8Syqw"

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    Chris Hadfield uploaded this pic on Jan.8 and tweeted, "Thunderstorm from above. What animal to you see? pic.twitter.com/7HJuRPYS"

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    Chris Hadfield uploaded this photo and tweeted, "Even from 400 km up you can sense the searing dryness of southern Saudi Arabia. pic.twitter.com/qmWaQMw2"

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    Chris Hadfield tweeted this photo and wrote, "Italian coast - like a diamond set in a ring. pic.twitter.com/wkklDEnX"

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    Chris Hadfield uploaded this photo on Jan. 6 and tweeted, "Japanese rice fields tidily blanketed with snow. pic.twitter.com/zH4Zl15o"

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    On Jan. 8, Chris Hadfield uploaded this shot and tweeted, "Australia - the dryness creates colours and textures that make the Outback immediately recognizable from space. pic.twitter.com/0D4lvgJt"

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    Chris Hadfield uploaded this photo and tweeted, "Our atmosphere has distinct layers; the troposphere and stratosphere are easily visible from orbit. pic.twitter.com/p0HReJd0"

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    Chris Hadfield uploaded this photo and wrote, "Goose Bay, Happy Valley, Labrador. I flew CF-18s as an RCAF fighter pilot here. pic.twitter.com/khsFi0WB"

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    Chris Hadfield uploaded this photo and tweeted, "It's hard to believe the colours of the Bahamas from space. pic.twitter.com/0DhYXmel"

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    Chris Hadfield uploaded this photo and wrote, "A crazed stained glass mosaic - the winter black and white of farms in central Asia. pic.twitter.com/bVdxA2ZW"

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    Chris Hadfield uploaded this photo and tweeted, "Hurghada, Egypt, a popular tourism and diving site on the Red Sea. pic.twitter.com/tA1kPidY"

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    Chris Hadfield uploaded this shot and wrote, "Key Largo, FL - home of the Aquarius underwater habitat; I commanded a crew of 6 for 2 weeks on the ocean floor here. pic.twitter.com/Mf0rff0B"

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    Chris Hadfield tweeted this photo and wrote, "Sharm el Sheikh, at the tip of the Sinai on the Red Sea. pic.twitter.com/vGyezdqT"

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    Chris Hadfield uploaded this photo on Jan. 9 and tweeted, "Astronaut's Breakfast - corn flakes, juice and coffee. Flakes in a bag with powdered milk, coffee through a straw. pic.twitter.com/TfJTHFsP"

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    Chris Hadfield uploaded this photo on Jan. 11 and tweeted, "Space Deadlift - using our resistive exercise machine to keep bones dense and muscles strong while weightless. pic.twitter.com/5gtGMAPk"

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    Next: Breathtaking Volcanic Eruptions from Space

    Thomas H. Marshburn tweeted this picture on Nov. 30, 2012, and tweeted, "Russian poster for our Soyuz 33 crew. pic.twitter.com/hdilFnYx"