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CAPE CANAVERAL, Fla. – The United Launch Alliance Atlas V rocket carrying NASA's Solar Dynamics Observatory defies gravity at Launch Complex 41 on Cape Canaveral Air Force Station as its engines ignite. Liftoff was at 10:23 a.m. EST Feb. 11. This is the 100th launch of a commercial Atlas_Centaur rocket. The observatory, known as SDO, is the first mission in NASA's Living With a Star Program and is designed to study the causes of solar variability and its impacts on Earth. The spacecraft's long-term measurements will give solar scientists in-depth information to help characterize the interior…
