Greenhouse gas emissions are at the forefront of climate research, and we have now deployed the first advanced satellite to monitor them from space. This mission is key to understanding and mitigating the impact of these gases on our planet's climate. On August 16, a SpaceX Falcon 9 rocket successfully launched from Space Launch Complex 4E at Vandenberg Space Force Base in California, carrying a state-of-the-art greenhouse gas monitoring instrument. (Eric Ralls, more at earth.com)