CATS (2 of 3) (image) NASA/Johnson Space Center Caption By reflecting sunlight into space, clouds help regulate the Earth's climate. This image was taken from aboard the International Space Station, which is where the Cloud-Aerosol Transport System (CATS) will measure cloud aerosols. Credit NASA Usage Restrictions credit to NASA 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.