Whatever name it sailed under — International Sun-Earth Explorer 3, and International Cometary Explorer, among others — this spacecraft has scored a number of firsts over the years, including the first comet flyby.
NASA Goddard Spaceflight Center
NASA Administrator Charles Bolden speaks during a news conference in Berlin on Monday. Bolden said no single country was indispensable to the International Space Station's success.
An image shot by NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua satellite on Wednesday. It shows multiple wildfires in Calif. trailing smoke into the Pacific Ocean.