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There may be a lot more than we thought to the belt of icy debris that circles the outer Solar System.hints at unexpected levels of particles where dust ought to be thinning out, suggesting the donut-shaped field extends significantly farther from the Sun than previous estimates suggest.
"New Horizons is making the first direct measurements of interplanetary dust far beyond Neptune and Pluto, so every observation could lead to a discovery," The Kuiper Belt is characterized by a high density of rocky, icy objects . It's filled with large rocks and dwarf planets, and a whole bunch of objects that we can't really see because they're relatively small, and it's very dark out there. But dust can tell us a fair bit about what's going on.New Horizons is the NASA probe launched to explore the outer Solar System.
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