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Q&A How to build a telescope using gravitational lensing?

A Type II civilization on the Kardashev scale has decided to build a telescope. This civilization spans its home galaxy and wields vast energies capable of moving and shaping matter on the scale of...

2 answers  ·  posted 8y ago by Mike Nichols‭  ·  last activity 6y ago by Mike Nichols‭

Question astronomy physics relativity