Explore these orbiting pioneers and learn what they've discovered. 3 min read The Hubble Space Telescope was designed to free astronomers of a limitation that has plagued them since the days of ...

Brian Greene (Cosmic String Theory) and Astrophysicist Ethan Siegel have collaborated on a National Geographic coffee-table ...

They delved into the telescope's guts during long space walks and replaced parts that the original designers never thought they'd need to. Installation of a new power-control unit forced an ...