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  "publishedAt": "2026-06-26T23:34:44.000Z",
  "site": "https://upstract.com",
  "textContent": "Uranus and Neptune remain two of the most mysterious objects in the solar system, primarily because they’ve only been visited by NASA’s Voyager 2 spacecraft in 1986 and 1989, respectively. Their “ice giant” moniker comes from longstanding hypotheses that their interiors are comprised of an icy…",
  "title": "Uranus, Neptune May Be Magma Worlds, Not Ice Giants"
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