Advanced Space Transportation Program (ASTP)
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Pictured here is an artist's depiction of the McDornel Douglas' wing body Single-Stage-to-Orbit (SSTO) Reusable Launch Vehicle (RLV) servicing the Hubble Space Telescope (HST) concept. The development of the RLV is essential in the cost reduction of future space travel. — NASA MSFC · 1995. ABD devlet eseri: kamu mali, ticari islerde de serbestce kullanilabilir.
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