Abstract

The International Year of Astronomy (IYA2009) is a global celebration of astronomy and its contribution to scientific development and cultural enrichment. Now, 400 years after Galileo Galilei first glimpsed the heavens through a telescope, astronomy is in the midst of a golden age. Taking advantage of the fantastic progress of technology, astronomers are exploring a solar system whose inner workings Galileo and Kepler started to unravel in 1609. For us, the universe is now an open book that we can read using telescopes on the ground and robotic probes in space. Using our instruments as “time machines”, we can peer back across history and see galaxies as they were when the universe was less than 10% of its present age. We have also confirmed the existence of other solar systems in our galaxy.

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