This Grand Finale, as NASA called it, came about as Cassini's fuel tank started getting low after 13 years exploring the planet. Scientists wanted to prevent Cassini from crashing into Enceladus or Titan — and contaminating those pristine worlds. And so in April, Cassini was directed into the previously unexplored gap between Saturn's cloud tops and the rings. Twenty-two times, Cassini entered the gap and came out again. The last time was last week.
The leader of Cassini's imaging team, Carolyn Porco, a visiting scholar at the University of California, Berkeley, was so involved with the mission for so long that now, "I consider it the start of life, part two."
Cassini departed Earth in 1997 and arrived at the sixth planet from our sun in 2004. The hitchhiking European Huygens landed on big moon Titan in 2005. Nothing from Earth has landed farther. Three other spacecraft previously flew past Saturn, but Cassini was the only one to actually circle the planet.
In all, Cassini collected more than 453,000 images and traveled 4.9 billion miles. It was an international endeavor, with 27 nations taking part. The final price tag was $3.9 billion.
European space officials joined their U.S. colleagues to bid Cassini farewell.
"It's a very historical moment," said the Italian Space Agency's president, Roberto Battiston.
There were lighthearted touches as well. During its broadcast NASA played a video clip of the Cassini Virtual Singers, spacecraft team members who belted out, "Tonight, tonight, we take the plunge tonight ..." to the music from "West Side Story."
Scientists are already eager to go back and delve into the wet, wild worlds of Enceladus and Titan. Proposals are under consideration by NASA, but there's nothing official yet. In the meantime, NASA plans sometime in the 2020s to send an orbiter and lander to Europa, a moon of Jupiter believed to have a global ocean that might be compatible for life.
"Yes, we really want to go back" to Saturn, Zurbuchen said. "It's such a wonderful system, we don't want to leave it alone."
https://www.youtube.com/watch?time_continue=5&v=pPnZQIkSNmU
Robert Picardo, an actor from TV's old "Star Trek: Voyager" series, also contributed to Cassini’s send-off.
Collaborating with the creative director of The Planetary Society, presto, "Le Cassini Opera" was born.
Picardo set the lyrics to the instantly recognizable aria "La Donna e mobile" from Verdi's "Rigoletto."
While Cassini's 20-year mission has been "a serious success," Picardo said the opera is definitely a comedy. Here's how it opens: "Goodbye, Cassini. Your mission's fini. Bravo, Cassini! Have some linguini." And on it goes, paying humorous tribute.
"No tragedy here. All good things — NASA missions, 'Star Trek' series, turkey and Swiss sandwiches with avocado — come to an end," Picardo told The Associated Press.
Cassini's program manager, Earl Maize, loves the performance.
"It's very heartwarming to us," Maize told reporters Wednesday at the Jet Propulsion Laboratory in Pasadena, California.
"Part of what we try to do is to extend everybody out to Saturn. It's not science for the ivory tower. It's for humanity, and so everybody to get on the ride, come with us, is just phenomenal."
That was Picardo's goal, too. A longtime fan of both space and opera, he merged those interests in "Star Trek: Voyager" as the holographic doctor who bursts into song. It seemed fitting that he celebrate Cassini in song, too. He actually got to see Cassini's hitchhiking moon lander, the European Huygens, before it left Earth in 1997.
Estimating that he spent a mere minute on the lyrics several weeks ago, Picardo said Wednesday from Beverly Hills, California, that he sang "Le Cassini Opera" through twice. Five minutes, and that was a wrap.
"It was definitely a seat-of-the-pants production," he said.
Picardo, who's on the board of the Planetary Society, an advocacy group for space exploration, said he's delighted that the opera has been so well received.
For more than a decade, NASA's Cassini spacecraft at Saturn took "a magnifying glass" to the enchanting planet, its moons and rings.
Cassini revealed wet, exotic worlds that might harbor life: the moons Enceladus and Titan. It unveiled moonlets embedded in the rings. It also gave us front-row seats to Saturn's changing seasons and a storm so vast that it encircled the planet.
"We've had an incredible 13-year journey around Saturn, returning data like a giant firehose, just flooding us with data," said project scientist Linda Spilker with NASA's Jet Propulsion Laboratory in Pasadena, California. "Almost like we've taken a magnifying glass to the planet and the rings."
Cassini streamed back new details about Saturn's atmosphere right up until its blazing finale on Friday. Its delicate thrusters no match for the thickening atmosphere, the spacecraft tumbled out of control during its rapid plunge and burned up like a meteor over Saturn's skies.
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