Studying Red-Giant Stars with TESS Data (IMAGE) Iowa State University Caption The NASA TESS mission is surveying the sky one sector at a time as it searches for planets. Here's the spacecraft's 13-sector mosaic of the southern sky, recorded over the course of a year. One object shown in the mosaic is a long, bright edge of our Milky Way galaxy. Credit Image by NASA/MIT/TESS 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.