Back to the Past of the Milky Way (IMAGE) University of Barcelona Caption The spiral shape of fig 1c of the Nature article appears inside an old watch symbolising the fact that these data has allowed us to date back the perturbation that shook the Milky Way disk. This figure shows how from the new obtained Gaia data we can know more about the past of the Galaxy. Credit Crèdit : Edmon de Haro/iStock 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.