Soaring like a bird above the Sierra Nevada snowscape, a NASA ER-2 high-altitude Earth science aircraft banks during flight. NASA’s…
The comet Lulin (center-right) is seen through the trees from Shenandoah National Park in Virginia, Monday, Feb. 23, 2009. Lulin,…
Technicians are installing ion engine #1 in the High Vacuum Tank in the Electric Propulsion Research Building in this image…
