Using completely new ways of deducing the ages of red giant stars, astronomers have created the first large scale map that shows stellar ages in the Milky Way. Determining the ages of nearly 100,000 red giant stars, at distances of up to 50,000 light years from the galactic center, astronomers from the Max Planck Institute for Astronomy in Germany were able to test key ideas about the growth of the Milky Way. Notably, the map confirms that our home galaxy has grown from the inside out -- Today, most old stars can be found in the middle and more recently formed ones in the outskirts.