A small icy world far beyond Neptune possesses a ring like the ones around Saturn.Perplexingly, the ring is at a distance where simple gravitational calculations suggest there should be none.That's very strange, said Bruno Morgado, a professor at the Federal University of Rio de Janeiro in Brazil.Dr. Morgado is the lead author of a paper published in the journal Nature on Wednesday that describes the ring that encircles Quaoar, a planetary body about 700 miles in diameter that orbits the sun at a distance of about four billion miles.
#years #los-angeles #massachusetts #solar-system #constraints #lead-author #astronomers #astrophysics
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