The Kuiper Belt is packed with weird peanut-shaped objects. Astronomers think they know why

February 19, 2026 3 min read Add Us On GoogleAdd SciAm Our solar system is surrounded by weird peanut-shaped objects. Astronomers think they know why A study published today helps explain how “planetesimals”—the building blocks of planets—came to be By Joseph Howlett edited by Lee Billings The planetesimal Arrokoth, as pictured by the New Horizons…

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