Galileo’s Final Dance: A Dying Probe’s Last Flyby of Jupiter’s Red Moon
On Nov. 2002, NASA’s Galileo was a ghost ship, its fuel tanks nearly empty, yet it still had one more swing by a moon before its inevitable death.
On Nov. 2002, NASA’s Galileo was a ghost ship, its fuel tanks nearly empty, yet it still had one more swing by a moon before its inevitable death. The target was Amalthea, a 168‑mile‑long rock that orbits just 112,468 miles from Jupiter and is the reddest object in the solar system.
Its surface, coated in sulfur, glows a deep crimson, and it even generates more heat than it receives from the Sun, a mystery that has scientists buzzing. The flyby was a gamble. Amalthea’s proximity to Jupiter means the probe would be bathed in the planet’s fierce magnetic field and lethal radiation.
As Galileo passed within 99 miles, the radiation knocked the spacecraft into safe mode only half an hour later. NASA’s engineers, knowing the probe was already on its last legs, scrambled to restore power. Within minutes, the system rebooted, and Galileo resumed its mission, proving that even a dying probe can still push the envelope.
Less than a year after that tense moment, Galileo’s final act came in September 2005.
The craft plunged into Jupiter’s atmosphere, crushed by the crushing pressure, but its instruments had already sent back a treasure trove of data.
Among the most intriguing was the revelation that Amalthea is a loose pile of icy rubble, less dense than water, hinting at a composition of ice and rock with significant porosity.
The story of Galileo’s last flyby reminds us that the harshest environments can still yield scientific gold, but they also demand resilience from our hardware.
Future missions to the Jovian system will need to design for radiation tolerance and rapid recovery, especially when venturing close to moons like Amalthea that challenge our assumptions about planetary bodies.
The story so far
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Original publication: 5 November 2026 23:57
