Astronomers had dreamt of a telescope that would photograph the universe more ____ than telescopes on the ground could. That dream came true in 1990 when the Hubble Space Telescope was launched into orbit ____ 612 km. (380 mi.) above the Earth. Hubble has photographed some of the ____ beautiful images of space ever taken. But that’s not all. It has ____ expanded our knowledge of space. Before Hubble, astronomers could not estimate the age of the universe as ____ they can now. Because of what they’ve seen through Hubble, astronomers have estimated that the universe is around 14 billion years old. What’s after Hubble? The Webb Space Telescope, which will measure distant objects even more accurately than Hubble.

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