twosmallpiecesMore than 400 years ago, Galileo was the first person to use a simple telescope to explore the night sky. Trace the history of the telescope from Galileo's stunning discoveries to the...Two Small Pieces of Glass: The Amazing Telescope event flyerFeature ShowsEarth and Space Sciences60 MinutesGrades 4 & UpEarth's Place in the Universe,Engineering Design,Space SystemsHistory