Star Formations (IMAGE) Rice University Caption In this compilation, each black-and-white image corresponds to the color image above. In the black-and-white frames, black corresponds to atomic hydrogen and white to molecular hydrogen. In the color frames, red shows molecular hydrogen, green shows where hydrogen has been ionized and blue traces high ionization gas near massive O-type stars. Credit P. Hartigan/Rice University Usage Restrictions For news reporting purposes 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.