At Vandenberg Air Force Base in California, the transporter holding NASA's Orbiting Carbon Observatory, or OCO, heads for Launch Complex 576-E. OCO will collect precise global measurements of carbon dioxide (CO2) in the Earth's atmosphere. Scientists will analyze OCO data to improve our understanding of the natural processes and human activities that regulate the abundance and distribution of this important greenhouse gas. OCO is scheduled to launch Feb. 24 aboard an Orbital Sciences' Taurus XL rocket. Photo credit: NASA/VAFB
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