The upper stage uses helium to maintain the proper environmental conditions for the stage’s engine and to pressurize liquid hydrogen and liquid oxygen propellant tanks.
Mr Newman sensibly suggested that senior civil servants should be paid like private sector professionals, with a smaller base salary with performance-based rewards.
Originally announced by Malcolm Turnbull at $2 billion, costs rose to $12 billion by 2023 with operations now set for 2028.
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