On September 30, 2016, the European Space Agency’s Rosetta spacecraft ended its mission orbiting Comet 67P. The mission added knowledge on how planets came together and how life arrived on Earth. “One of Rosetta’s key findings is that comets are probably not the source of Earth’s water.” I submit that of even greater importance is a finding that can be indexed as philosophical in nature.
In particular, the European Space Agency “released audio of a ‘cosmic song,’ created by the magnetic fields oscillating in the trail of particles flying off the comet.” In particular, movements in the comet’s Magnetic field are caused by solar particles hitting and electrically charging the comet’s atmosphere. The “song” resembles the sounds that whales make. Perhaps it resonates with our music as well. For one thing, the beat of the cosmic song is regular and the pitch varies from “note” to “note.”
Philosophically, the finding may confirm Plato’s theory of justice as “the harmony of the spheres” being in line with the harmonies of a well-ordered city (polis) and mind (psyche). Justice “just is” the harmony between and within these three things—the universe, the city, and the mind. The harmony, as with our music, has mathematical aspects (e.g., low, middle, and high notes, of intervals of duration (e.g., eighth, quarter, half, and full notes). The comet’s “cosmic song” adds to the accumulating empirical support for Plato’s theory.
It would be really astounding were the mathematical-musical vibrations of a reason-ordering-the-passions human mind and the vibrations of a reason-ordered city in sync with the vibrations given off by suns, planets, and comets—with those respective mathematical-musical vibrations in harmony with each other. That such a confluence is itself just blows the mind.
The implication is that keeping your passions under the control of your reasoning ability puts you in a very subtle sense in harmony with the “cosmic song” of the observed comet. Perhaps people enjoy music so much because it can serve as a mediator helping the mind to be well-ordered (hence suitable for order-imposing reasoning) and in sync with the harmonies of the heavenly spheres, including comets. It is worthwhile simply pondering how justice as we typically construe the term boils down to that “syncness.”
 Kenneth Chang, “Rosetta Mission Ends With Spacecraft’s Dive Into Comet,” The New York Times, September 30, 2016.