Protoplanetary Disc Without a Planet (IMAGE) University of Warwick Caption Giant planets that developed early in a star system's life could solve a mystery of why spiral structures are not observed in young protoplanetary discs, according to a new study by University of Warwick astronomers. Credit University of Warwick Usage Restrictions Use only in relation to this story and with credit. 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.