Themis Main Belt (image) University of Tennessee at Knoxville Caption This image shows the Themis Main Belt which sits between Mars and Jupiter. Asteroid 24 Themis, one of the largest Main Belt asteroids, was examined by University of Tennessee scientist, Josh Emery, who found water ice and organic material on the asteroid's surface. His findings were published in the April 2010 issue of Nature. Credit Josh Emery/University of Tennessee, Knoxville Usage Restrictions This image may not be used for commercial purposes without the consent of the University of Tennessee, Knoxville. 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.