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Space Shuttle Discovery was powered down forever and the payload bay doors were locked tight for the final time on Friday, Dec. 16, by technicians at NASA’s Kennedy Space Center (KSC) in Florida.

Take a good last glimpse inside the retiring Discovery’s payload bay as the clamshell like doors seal off all indigenous US human spaceflight capability for several years at a minimum.

The historic “Power Down” came after both of the 60 foot long cargo bay doors were swung shut this morning for the last time inside the shuttle hanger known as Orbiter Processing Facility-1 (OPF-1) – in the shadow of the cavernous Vehicle Assembly Building (VAB).

Workers at KSC are in the final stages of the transition and retirement activities that will soon lead to Discovery departing her Florida launch pad forever on her final voyage. They are converting the orbiter from active duty flight status to display as a nonfunctional and stationary museum piece.

Kennedy Space Center Director Robert Cabana, a former space shuttle commander, formally marked the final power down and sealing of Discovery’s payload bay doors at a ceremony in OPF-1 with the skeleton force of remaining shuttle personnel engaged in the decommissioning efforts.

Discovery’s payload bay is glimpsed for the final time as its doors swing shut with the aid of yellow-painted strongbacks, hardware used to support and operate the doors when the shuttle is not in space. Discovery's doors were closed and the vehicle was powered down for the final time. Discovery is being prepared for public display at the Smithsonian’s National Air and Space Museum Steven F. Udvar-Hazy Center in Chantilly, Va., in 2012. Credit: NASA/Kim Shiflett

Discovery was the Fleet leader and NASA’s oldest orbiter having flown the most missions. All told Discovery soared 39 times to space from her maiden flight in 1984 to her last touchdown on the STS-133 mission in March 2011.

In between, Discovery deployed the iconic Hubble Space Telescope, launched the Ulysses solar probe and numerous other science satellites and Department of Defense surveillance platforms, conducted the first shuttle rendezvous with Russia’s Mir Space Station and delivered key components to the International Space Station including the last habitable module.

Discovery payload bay and doors sealed for History inside Orbiter Processing Facility-1 at KSC. Credit: NASA/Kim Shiflett

Discovery flew both ‘return to flight’ missions following the Challenger and Columbia tragedies as well as the second flight of Astronaut and Senator John Glenn, first American to orbit the Earth.

Discovery has been thoroughly cleansed and cleared of all hazardous materials in preparation for making the vehicle safe for public display at her new and final resting place, the Smithsonian’s National Air and Space Museum Steven F. Udvar-Hazy Center in Chantilly, Va..

Technicians re-installed the three power generating fuel cells after draining and purging all the toxic materials and fuels from the fuel lines and assemblies. Three replica space shuttle main engines were also installed last week.

The "vehicle powered" sign is momentarily lit as KSC technicians prepare to power down space shuttle Discovery for the last time. Credit: NASA/Kim Shiflett
The "vehicle powered" sign is turned off following the final power down of space shuttle Discovery. Credit: NASA/Kim Shiflett

In 2012, the 100 ton orbiter will be hoisted piggyback atop NASA’s specially modified 747 carrier aircraft. Discovery will take flight for the last time in April and become the center piece at her new home inside the Smithsonian’s spaceflight exhibition in Virginia.

To make way for Discovery, the prototype shuttle Enterprise currently housed at the Smithsonian will be hauled out and flown to New York City for display at the Intrepid, Sea, Air and Space Museum.

Altogether, Discovery spent 365 days in space during the 39 missions, orbited Earth 5,830 times and traveled 148,221,675 miles during a career spanning 27 years.

There is nothing on the horizon comparable to NASA’s Space Shuttles. Their capabilities will be unmatched for several decades to come.

America is now totally dependent on the Russians for launching US astronauts to space until privately built ‘space taxis’ from firms like SpaceX, Boeing and Sierra Nevada are ready in perhaps 4 to 6 years.

Liftoff of Space Shuttle Discovery on the STS-133 mission from the Kennedy Space Center on 39th and historic final flight to space. Credit: Ken Kremer
Space Shuttle Discovery rolling to the Vehicle Assembly Building during summer 2011 as it's being processed for retirement before transport to permanent home at the Smithsonian Air & Space Museum in Virginia. Thrusters, OMS pods and main engines were removed for cleaning of toxic components and fuels. Credit: Ken Kremer
Ken Kremer

Dr. Ken Kremer is a speaker, research scientist, freelance science journalist (KSC area,FL) and photographer whose articles, space exploration images and Mars mosaics have appeared in magazines, books, websites and calendars including Astronomy Picture of the Day, NBC, FOX, BBC, SPACE.com, Spaceflight Now, Science and the covers of Aviation Week & Space Technology, Spaceflight and the Explorers Club magazines. Ken has presented at numerous educational institutions, civic & religious organizations, museums and astronomy clubs. Ken has reported first hand from the Kennedy Space Center, Cape Canaveral, NASA Wallops, NASA Michoud/Stennis/Langley and on over 80 launches including 8 shuttle launches. He lectures on both Human and Robotic spaceflight - www.kenkremer.com. Follow Ken on Facebook and Twitter

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