100 Hours of Astronomy: Observing the Sky (IMAGE) International Astronomical Union Caption For 4 days, from April 2-5, 2009, amateur astronomers, professional astronomers, educators and people all around the world will share the experience of observing the sky. In this picture amateur astronomers are preparing their equipment for a night of astronomical discoveries. Credit TWAN/Babak Tafreshi Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.