35K views · 1.1K reactions | NASA's veteran Cassini mission will officially kick off its farewell tour of the Saturn system on April 22 with a final close encounter of the ringed planet's largest moon, Titan. Five months later, on Sept. 15, Cassini will spectacularly burn up in Saturn's crushing atmosphere. Sad, we know, but great sacrifices must be made in the name of science. Keep reading: https://goo.gl/xtw1jt | Space.com | Facebook