OTD…Oct. 15 and Cassini

#OTD in 1991, 1992 and 1993…flights by Discovery and Endeavour

#OTD…in 1996, Atlantis launched to Russia’s space station Mir

NASA has released an image of Saturn’s moons Enceladus and Tethys caught in a rare alignment by the Cassini spacecraft, which is heading for its final close encounter with the icy moon Enceladus Saturday.