
Image credit: North American Rockwell
Image source: Numbers Station

Image credit: North American Rockwell
Image source: Numbers Station

Image credit: NASA Glenn
Image source: National Archives

Image credit: NASA Glenn
Image source: National Archives

Image credit: NASA Glenn
Image source: National Archives



Image credit: McDonnell Douglas
File source: NASA NTRS

Image credit: NASA
Image source: National Archives

Image credit: NASA
Image source: National Archives

In this artist’s concept from 1971, an Earth-to orbit fuel tanker approaches the Orbital Propellant Depot. As envisioned by Marshall Space Flight Center Program Devlopment plarners, an orbital modular propellant storage depot, supplied periodically by the Space Shuttle or Earth-to-orbit fuel tankers would be critical in making available large amounts of fuel to various orbital vehicles and spacecraft.
Image credit: NASA
Image source: NASA Marshall