when were these rings discovered?
In 1979
Rings of Jupiter
 It was first observed in 1979 by the "Voyager 1" space probe
where do the particles in jupiter's rings come from It consist of dust ejected from the moons Metis, Adrastea are there different types of rings around the planet? UNANSWERABLE
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Rings of Jupiter [SEP] Discovery and structure
Jupiter's ring system was the third to be discovered in the Solar System, after those of Saturn and Uranus. It was first observed in 1979 by the "Voyager 1" space probe. It is composed of four main components: a thick inner torus of particles known as the "halo ring"; a relatively bright, exceptionally thin "main ring"; and two wide, thick and faint outer "gossamer rings", named after the moons of whose material they are composed: Amalthea and Thebe. The principal attributes of the known Jovian Rings are listed in the table.