The Hubble Space Telescope (HST) has given astronomers a look at distant parts of the universe without the interference of Earth's atmosphere. Some objects pictured by HST are calculated to be 15 billion light years away. It has taken light that long to reach Earth.
Astronauts launched on Shuttle missions have repaired and maintained the orbiting craft to keep it functioning properly. It was discovered that the manufacturing process left the primary mirror slightly out of focus but scientists were able to fix the problem. Images of areas of the sky that were thought to be empty have revealed hundreds of galaxies beyond our own.
Sample HST images.
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