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Aaronvan
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Gravity Probe B cost the taxpayer nearly three-quarters of a billion dollars, more than LIGO. However, none of GP-B’s research (frame-dragging, geodetic effect) captured the public's imagination like LIGO/gravitational waves. Perhaps that is because LIGO opens up a new window on the universe, while GP-B was merely another confirmation of general relativity. So, was GP-B worth nearly one billion dollars?