Resumen de Sun's gravity could boost video from deep space
Independent astrophysicist Michael Hippke found that to receive even a single-watt signal sent by a probe at Alpha Centauri, an Earth-based instrument would need to be 53 kilometers across--that's bigger than New York City. In his study, Hippke proposes instead that a telescope about a meter across could relay the signal. It would just have to be placed at a point about 90 billion km from the sun--a distance that would optimize an effect known as gravitational lensing to magnify the signal.
