What will NASA do?
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De-orbit the Hubble and use the-soon-to-be-launched James Web Telescope
Yes, the JWST launch scheduled for November. Would be nice to keep Hubble in operation for as long and cost effectively as possible. It is still doing important science (like Palomar!) and is a hedge against any problems with the Webb launch and deployment.
Rather than waste this tech, strap 2 Falcon Heavys to it and park it in a useful Mars orbit in the next launch window Sept. 2022. To be pointed towards Mars.
Perhaps fit it atop a cargo shot. Same for the ISS -- it's dying, so stuff it full of cargo and shoot it to Mars while we are lifting the ISS replacement to orbit.
This is one deep vein I share with Musk -- stop wasting goddamn time and utilize every possible hold that has already been lifted to orbit and point it to Big Red.