article_snippet: But using measurements of the ringed planet’s gravitational field combined with its shape and density, scientists have determined a more exact value for a day on the planet’s.
article_snippet: This is based on measuring This gravitational field, shape and density .
article_snippet: Scientists used measurements of the ringed planet’s gravitational field combined with its shape and density, some of which was gathered by the Cassini spacecraft in orbit (artist's illustration shown)
highlights_snippet: This is based on measuring This gravitational field, shape and density .
  