... Cassini Approaches Saturn . ... Last month, Cassini snapped several images during an engineering test. The International Space Station Expands Again . ... Last month the Space Shuttle Atlantis visited the ISS and installed the third of eleven pieces that will compose the Integrated Truss Structure. ... At 1,500 light-years across, this expansive cloud of interstellar gas and dust is effectively a giant stellar nursery located some three million light-years distant in the spiral galaxy, M33. ...