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HR 4796A: A Recipe for Planets

Two hundred and twenty light years from Earth, planets are forming around the binary star system HR 4796. One of the stars is surrounded by a dusty gaseous disk. This disk is the right size, age, and density for dust pellets to accrete surrounding matter. A hole in the disk's center indicates that increasingly larger condensates are colliding and sticking together, coalescing into moons and planets.