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Cassini spacecraft entered into orbit around Saturn in July 2004. Cassini 's images of the rings are the most detailed to-date, and are responsible for the discovery of yet more ringlets.
22 de sept. de 2017 · Scientists have ideas about why Saturn has rings, but no one knows for sure. What are Saturn's rings made of? Are they solid like the CD you used to make your model? Or are they made of many particles dancing in formation around the planet? Four robotic spacecraft from Earth have visited Saturn—Pioneer 11, Voyager 1, Voyager 2 and ...
Saturn’s Rings: Young and Ephemeral, Three NASA Ames Studies Say.
8 de nov. de 2017 · Saturn's rings are made up of billions of particles ranging from grains of sand to mountain-size chunks. Composed predominantly of water-ice, the rings also draw in rocky meteoroids as they...
29 de ago. de 2005 · The rings of Saturn make up an enormous, complex structure that – from edge-to-edge – is wider than the distance from Earth to the Moon. The seven main rings are labeled in the order in which they were discovered; from the planet outward, they are D, C, B, A, F, G and E.
Cassini found that much of the material for Saturn's E-ring—a diffuse ring outside the bright, main rings—comes from the moon Enceladus, which is venting icy particles and gas into space as it orbits Saturn.
The rings of Saturn have puzzled astronomers ever since they were first seen by Galileo in 1610, during the first telescopic observations of this planet. Although he saw the rings first, Galileo did not know what they were. They appeared to him as 'ears' or lobes either side of the planet.
