Iota Orionis Star System (IMAGE) University of Montreal Caption Iota Orionis is a binary star system and is easily visible with the naked eye, being the brightest star in the constellation Orion's sword. Credit Danielle Futselaar Usage Restrictions To illustrate this study only. 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.