Lasers could ensure satellites fly in perfect formation

How can astronomers ensure that their space telescopes fly in ultra-precise formations around our planet? By combining the push of laser light with the pull of tethers, believes one physicist. The question is an important one. While giant telescopes and sensitive detectors hundreds of metres across would provide an incredible window on the Universe, they would be prohibitively expensive and cumbersome to launch and maintain in space.

Site – http://www.newscientistspace.com

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