Technologies change the world when they expand the range of the human senses. We've already seen— through the eyes of the Hubble Space Telescope —early galaxies. The Cosmic Background Explorer, a satellite that looked at microwave radiation left over from the big bang, revealed how unformed matter coalesced into the seeds of gigantic galactic clusters. But there's still a lot more to see. Over the coming two decades, our vision will stretch farther than ever, across millions of miles and billions of years, transcending time and space.
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