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07-May-01 | RXTE finds evidence of frame dragging

An astronomer at Goddard Space Flight Center using the Rossi X-ray Timing Explorer has found observational evidence that rotating black holes create a whirlpool effect, essentially twisting the fabric of spacetime around them. (NASA Press Release, 30-Apr-01) This may sound like old news, as LAGEOS-1 helped scientists determine much the same thing about the Earth, albeit on a lesser scale, some three years ago. RXTE was launched on Delta 230 in December 1995. (LAGEOS dates back to 1976, aboard Delta 123.)

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