摘要: A new research aircraft began operations at the NASA Lewis Research Center this past year. The aircraft, a McDonnell Douglas Corporation DC-9, began providing researchers funded by NASA Headquarter's Microgravity Science and Appli... 展开 A new research aircraft began operations at the NASA Lewis Research Center this past year. The aircraft, a McDonnell Douglas Corporation DC-9, began providing researchers funded by NASA Headquarter's Microgravity Science and Applications Division addition ... 收起