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      The 10 Most Dangerous Moments in Space Shuttle and Station History

      Astronauts are even braver than you think. Here's a list of NASA's closest calls during the history of the agency's shuttle program

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      The 10 Most Dangerous Moments in Space Shuttle and Station History
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      Credits: NASA

      The 10 Most Dangerous Moments in Space Shuttle and Station History

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      • 10. ORBITAL BULLETS--JUNE 28, 2011 Space above Earth is a lethal junkyard littered with countless scraps speeding by at tens of thousands of kilometers per hour. The trash runs the gamut from pieces of explosive bolts to farings from rocket nose-cones and, lately, bits of a satellite deliberately blown up by China... NASA
      • 9. SNAGGED SOLAR ARRAY--NOVEMBER 3, 2007 The space station’s four pairs of solar arrays, each close to a football field long end to end, provide all of the orbital laboratory’s electricity. During the STS-120 space shuttle mission, astronauts moved one of the station’s solar-array pairs to a new location, then unfurled them... NASA
      • 8. EXPLOSIVE LANDING--DECEMBER 8, 1983 Hydrazine is a nasty fuel that smells like ammonia and can ignite spontaneously when exposed to air. When the ninth space shuttle mission landed at Edwards Air Force Base in California, hydrazine leaked from an auxiliary power unit on the shuttle and caught fire—but no one at NASA knew until the next day... NASA/JSC Digital Image Collection
      • 7. SOLAR FLARE--JANUARY 20, 2005 Space weather is a looming threat for any space flier. Even those cradled in a spacecraft within the Earth’s protective magnetic shield can feel the wrath of solar radiation storms... NASA/Earth Observatory
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      • 6. SEVERE TILE DAMAGE--DECEMBER 1988 The space shuttle's thermal protection system is an armor of heat-resistant tiles that diverts super-heated plasma during reentry. And as NASA was forced to address with the loss of Columbia and its crew in 2003, damage to those tiles is a life-threatening situation... NASA
      • 5. FLAT TIRE, FAILED BRAKES--APRIL 19, 1985 The last thing you want when landing 100 tons of the most complex machine ever built by humans is a flat tire. Or a brake failure. Both happened to the seven-person crew of the STS-51-D space shuttle mission when they landed at Edwards Air Force Base in California—with U.S...
      • 4 LAUNCH PAD FIRE--JUNE 26, 1984 Technical glitches plagued the first launch of space shuttle Discovery . After the crew of six (shown here participating in fire training exercises) climbed into the spacecraft for the third time at Launch Pad 39A, a fuel valve in one of the Discovery ’s three main engines failed to open four seconds before launch... NASA/JSC Digital Image Collection
      • 3. SOYUZ LOSES CONTROL--OCTOBER 16, 2004 When necessary in the past decade or so, NASA has ferried its astronauts to the space station aboard Russia’s Soyuz spacecraft (an option it will be stuck with after Atlantis ’s final launch and until the advent of mature commercial vehicles)... NASA
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      • 2. BAD DIRECTIONS--JANUARY 1990 Several times during a space shuttle mission, controllers in Houston beam up instructions called a "state vector." The coordinates tell the spaceship exactly where it is above the Earth so it can make extremely precise docking, undocking and reentry maneuvers... NASA/exploitcorporations
      • 1. O-RING EROSION--NOVEMBER 26, 1985 The launch of space shuttle Atlantis on November 26, 1985, would emerge as a haunting close call in the shadow of the Challenger disaster three months later. Rubber O-rings serve as a seal between segments of the shuttle’s solid rocket boosters and prevent hot gases from escaping as the rocket fuel burns... NASA
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      • 10. ORBITAL BULLETS--JUNE 28, 2011
      • 9. SNAGGED SOLAR ARRAY--NOVEMBER 3, 2007
      • 8. EXPLOSIVE LANDING--DECEMBER 8, 1983
      • 7. SOLAR FLARE--JANUARY 20, 2005
      • 6. SEVERE TILE DAMAGE--DECEMBER 1988
      • 5. FLAT TIRE, FAILED BRAKES--APRIL 19, 1985
      • 4 LAUNCH PAD FIRE--JUNE 26, 1984
      • 3. SOYUZ LOSES CONTROL--OCTOBER 16, 2004
      • 2. BAD DIRECTIONS--JANUARY 1990
      • 1. O-RING EROSION--NOVEMBER 26, 1985
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