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Light Antenna
Not what you think , Rather a light weight delivery method to allow a large 'scope to be deployed,and the width of the mirror directly depends on the rate of spin and camera shutter speed. The materials of the mirroring is what ever holds the best shape , reflectivity, but due to the possible size, errors can be minimized. Likely the added weight of a solar panel to operate the Gyro's for aiming and rotational synchronization, but once achieved, it can be powered down, until a new target needs to be targeted. Also if higher resolution is needed at a lower shutter rate, it can be made in an "X" shape, but I would think that is defeating the purpose. Kyle 
Addendum 
The "light antenna" was designed to allow reception of very high radio frequencies, microwave, light etc..
It would be rather easy to deploy (more bang for the buck), and due to the increase in size over conventional "Scopes" , would be more forgiving of error, and due to modern advanced electronics, even small flat mirror material can be allowed for, or a bendable material supported by the rigid bridge setup, allowing it to be "refocussed" at a target that is near or far, from the same location in orbit.
I deleted the last picture in the series, as it was accidentally posted, and dealt with a specific method of deployment and operation, likely not desired by the Scientific community.
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