AH Challenge; Skylab B + Salyut 6 = ISS in 1976?

[ArKhan]

here Space Shuttle dock on Skylab
source
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19790075817_1979075817.pdf

I've never seen a picture of skylab before. Why does it look like a space helicopter?

 

[Archibald]

the "rotor" is a telescope (Apollo Telescope Mount)

 

[Riain]

The rotor blades are 4 solar panels, as is the wing, the other being torn off at launch.

 

[alt_historian]

I've never seen a picture of skylab before. Why does it look like a space helicopter?

Siggable!