Cassini has begun transmitting the final images of its mission, revealing one last look at Saturn, its vast expanse of rings, and its mysterious moons before the spacecraft plunges into the planet’s atmosphere.
The spacecraft is now just hours away from its planned demise, after 13 years of groundbreaking discoveries at the ringed planet.
At around 7:54 a.m. (EST) Friday, Cassini will dive into Saturn’s atmosphere travelling at a speed of roughly 70,000 miles per hour, before sending out a final signal that will radiate across the solar system ‘like an echo.’
By the time this transmission reaches Earth, Cassini itself will be gone.
If all is according to schedule, the spacecraft captured its final image of the mission at 12:58 p.m. today, revealing the location at which it will make its fateful entry.
Cassini has begun transmitting the final images of its mission, revealing a last look at Saturn and its rings before the spacecraft plunges into the planet’s atmosphere. This image was captured on September 13
The space agency has begun releasing the raw, unprocessed images as Cassini prepares for its ‘death dive.’
According to NASA, Cassini used its visual and infrared mapping spectrometer (VIMS) to observe the impact site, which was, at the time, on Saturn’s night side.
Then, it was lit only by light reflected from the planet’s massive rings.
Cassini also employed its imaging cameras for supporting observations.
The spacecraft began its final approach to Saturn on Wednesday, after mission navigators confirmed it was on course for its entry into the planet’s atmosphere.
At around 7:54 a.m. (EST) Friday, Cassini will dive into Saturn’s atmosphere travelling at a speed of roughly 70,000 miles per hour, before sending out a final signal that will radiate across the solar system ‘like an echo.’ The image above is one of its last ever, taken on September 13
According to NASA, Cassini used its visual and infrared mapping spectrometer (VIMS) to observe the impact site, which was, at the time, on Saturn’s night side. Then, it was lit only by light reflected from the planet’s massive rings. This image shows a last look at the icy moon Enceladus, thought to contain the ingredients to support microbial life
If all is according to schedule, the spacecraft captured its final image of the mission at 12:58 p.m. today, revealing the location at which it will make its fateful entry
Over the course of Cassini’s Grand Finale mission, it’s come closer to Saturn than any spacecraft has before.
Just a minute after it breaks through Saturn’s atmosphere, NASA expects to lose contact with the spacecraft forever.
Cassini will have to fire its altitude control thrusters in short bursts to keep its antenna pointed at Earth.
Then as the atmosphere thickens, the thrusters will ramp up from 10 percent to 100 in just a minute.
‘Once they are firing at full capacity, the thrusters can do no more to keep Cassini stably pointed, and the spacecraft will begin to tumble,’ according to NASA.
The spacecraft is now just hours away from its planned demise, after 13 years of groundbreaking discoveries at the ringed planet
Then, it won’t take much for the connection to be lost – once the antenna points just a few fractions of a degree away from Earth, NASA says communication will be ‘severed permanently.’
‘The spacecraft’s final signal will be like an echo,’ said Earl Maize, Cassini project manager at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California.
‘It will radiate across the solar system for nearly an hour and a half after Cassini itself has gone.
‘Even though we’ll know that, at Saturn, Cassini has already met its fate, its mission isn’t truly over for us on Earth as long as we’re still receiving its signal.’
The space agency has begun releasing the raw, unprocessed images as Cassini prepares for its ‘death dive.’ The images taken yesterday and today have finally started to arrive to Earth
The spacecraft began its final approach to Saturn on Wednesday, after mission navigators confirmed it was on course for its entry into the planet’s atmosphere. This image shows one of its last looks at the moon Titan, captured on Sept 13
Cassini has begun transmitting the final images of its mission, revealing a last look at Saturn and its rings before the spacecraft plunges into the planet’s atmosphere. This photo was captured on Sept 13
In 13 years studying Saturn, Cassini has made countless groundbreaking observations.
And, its final plunge is expected to bring unprecedented insight on the ringed planet.
The spacecraft will keep its instruments firing until the last second, using eight out of its 12 space instruments to study Saturn’s atmosphere up close.
As it plummets toward the surface, the mission will collect data with all of its magnetosphere and plasma science instruments, the spacecraft’s radio science system, and its infrared and ultraviolet spectrometers.
The ‘death dive’ will allow Cassini to directly sample the composition and structure of Saturn’s atmosphere for the first time, using its Ion and Neutral Mass Spectrometer.
During one of its Grand Finale dives earlier this summer, it began work ‘sniffing out’ the planet’s exosphere – or, the outermost atmosphere.
In 13 years studying Saturn, Cassini has made countless groundbreaking observations. Here, it looks at Saturn’s rings one last time before diving into the atmosphere
Cassini flew by Titan one last time on Tuesday before transmitting images and scientific data from the flight. This unprocessed image of Titan was taken by NASA’s Cassini spacecraft during the mission’s final, distant flyby on Sept. 11, 2017
According to NASA, the spacecraft will be oriented so the instrument is pointed in the direction of motion, to allow it the best possible access to oncoming atmospheric gases.
‘The Cassini mission has been packed full of scientific firsts, and our unique planetary revelations will continue to the very end of the mission as Cassini becomes Saturn’s first planetary probe, sampling Saturn’s atmosphere up until the last second,’ said Linda Spilker, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.
‘We’ll be sending data in near real time as we rush headlong into the atmosphere — it’s truly a first-of-its-kind event at Saturn.’