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  • Standing on weathered concrete at an old launchpad from a bygone age, space tourists stop to photograph the current Ariane 5 launchpad while on a tour of the European Space Agency at Kourou, French Guiana. They are mostly Japanese, representing their B-SAT communications satellite which is to be sent into orbit later that night alongside a US-made Hughes Corporation and Lockheed Martin technology. An American NASA space technician walks past the four Japanese as they hold cameras that record their souvenirs of a memorable day at this space facility deep in the South American rainforest. The orange bags carried by all are gas masks. Should the out of sight rocket booster explode or leak liguid propellant, dangerous fumes might overcome the visitors.
    esa_guiana09114-08-2007_1.jpg
  • Hours before a European Space Agency Ariane 5 rocket launch, a computer monitor displays cryogenic data at the CDL3 launch centre at ESA's Space Centre at Kourou, French Guiana. It shows the status of liquid oxygen and liquid hydrogen propellant systems within a Vulcain engine. Stored in the launcher tanks and fed to the engine, they react chemically and expand in the engine combustion chamber then forced through the nozzle to provide the thrust that propels the vehicle into orbit. Cryogenic engines utilise propellants that are liquid under cryogenic conditions, at a temperature much lower than normal ambient conditions (-251°C for hydrogen and -184°C for oxygen). The advantage of cryogenic propellants is that they provide the highest thrust performance.
    esa_guiana05014-08-2007_1.jpg
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