Before his last fateful space mission he had worked with the composer Jean-Michel Jarre on a piece of music for Jarre’s then-upcoming album Rendez-Vous. It was intended that he would record his saxophone solo on board the Challenger, which would have made McNair’s solo the first original piece of music to have been recorded in space (although the song “Jingle Bells” had been played on a harmonica during an earlier Gemini 6 spaceflight). However, the recording was never made, as the flight ended in disaster and the deaths of its entire crew. The last of the Rendez-Vous pieces, “Last Rendez-Vous”, had the additional name “Ron’s Piece”. Ron McNair was supposed to take part in the concert through a live feed.
Ganymede: Ganymede is both the largest moon of Jupiter, our Solar System's planetary behemoth, as well as the largest moon in our entire Solar system. Observations of Ganymede by the HST in 2015 suggested the existence of a subsurface saline ocean. This is because patterns in auroral belts and rocking of the magnetic field hinted at the presence of an ocean. It is estimated to be approximately 100 kilometers deep with a surface situated below a crust of 150 kilometers.
"Ganymede's ocean might be organized like a Dagwood sandwich," commented Dr. Steve Vance in a May 1, 2014 statement. Dr. Vance, of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, went on to explain the weird moon's resemblance to the Blondie cartoon character's famous multi-layered sandwiches. The study, headed by Dr. Vance, provides new theoretical indications for the team's "club sandwich" model, originally proposed in 2013. The research appears in the journal Planetary and Space Science.
At last, on July 1, 2004, the Cassini spacecraft fired off its breaking rocket, glided into orbit around Saturn, and started taking pictures that left scientists in awe. It wasn't as if they hadn't been prepared for such wonders. The weeks leading up to Cassini's arrival at Saturn had served to intensify their already heated anticipation. It seemed as if each approach-picture taken was more enticing than the one preceding it.