While the rings themselves are likely long-lived structures, the individual pieces that comprise them don't stick around for millions of years.
"The lifetime of dust trapped in the ring is only about 100,000 years, so it does not provide much of a clue to the formation of the solar system," Jones said. "However, the ring is very important in understanding what happens to interplanetary dust, which we know from other studies is formed from asteroid collisions and cometary dust."
Further study of the dust rings near Venus and Earth could also aid researchers peering beyond our solar system, he added.
"These rings will need to be understood for future missions which aim to image exoplanets using interferometers, because the rings can mask the signal from the exoplanet," Jones said.
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