Atlantis, launched on Monday, is on a servicing mission to the Hubble Space Telescope. The shuttle is making its final approach to the telescope, which the Atlantis crew will grapple with a robotic arm and draw in for servicing in a series of spacewalks beginning tomorrow. Below we'll update you on the approach and grapple as the process unfolds.
Photo: NASA TV
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John Matson is a former reporter and editor for Scientific American who has written extensively about astronomy and physics. Follow John Matson on Twitter