| A new twist on the laser guide star could help future large space telescopes study extrasolar planets. The idea is to focus a laser beam from a separate small spacecraft onto the telescope so that its control system can keep its mirror aimed precisely at a faint Earthlike exoplanet, compensating for any tiny vibrations that could blur the images. Scientists at the Massachusetts Institute of technology (MIT; Cambridge, MA) say such a space-based laser guide star is within the reach of current technology. |
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