Possible Clues:

• Provides space for The Cloud and test site for those working on astrophysics in the 1970s
• NASA project launched in 1973
• Experimental space station
• 1973-79 space station
• Early US space station
• The orbital workshop was its largest component
• It burned and crashed in 1979
• It fell to earth in 1979
• Space station that crashed in 1979
• Station's scientific study of television by 1970s spacers?