Pedro Machado (IMAGE) Faculty of Sciences of the University of Lisbon Caption Pedro Machado, astrophysicist at Institute of Astrophysics and Space Sciences (IA), at the Faculty of Sciences of the University of Lisbon (Portugal). Credit Pedro Machado. Usage Restrictions Attribution is required. License Original 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.