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Four robotic spacecraft have observed Saturn's rings from the vicinity of the planet. Pioneer 11 ' s closest approach to Saturn occurred in September 1979 at a distance of 20,900 km (13,000 mi). [26] Pioneer 11 was responsible for the discovery of the F ring. [26]
He discovered Saturn's biggest moon, Titan, and was the first to explain Saturn's strange appearance as due to "a thin, flat ring, nowhere touching, and inclined to the ecliptic." [10] In 1662 Huygens developed what is now called the Huygenian eyepiece, a telescope with two lenses to diminish the amount of dispersion. [11]
In addition he discovered the Cassini Division in the rings of Saturn (1675). [7] He shares credit with Robert Hooke for the discovery of the Great Red Spot on Jupiter (ca. 1665). Around 1690, Cassini was the first to observe differential rotation within Jupiter's atmosphere.
Saturn has the most spectacular ring system, with seven rings and several gaps and divisions between them. Few missions have visited Saturn: Pioneer 11 and Voyagers 1 and 2 flew by, but Cassini ...
Saturn’s rings are seen as viewed by NASA’s Cassini spacecraft, which obtained the images that comprise this mosaic at a distance of approximately 450,000 miles from Saturn April 25, 2007.
The moonlet was first discovered in 2013, although its discovery was possible in 2012. [4] Cassini took 2 images of the edge of Saturn's A Ring, thereby ruling out it being a cosmic ray artifact. [3] There were disturbances at the edges of Saturn's A Ring, with one of these being approximately 20% brighter than its surroundings. There were also ...
See more on Saturn's rings: No telescope on this planet would ever have been able to see this. Cassini left Earth in 1997 and, in its nearly two decades of exploration, has sent home remarkable ...
Pioneer 11 image of Saturn.. Saturn was first visited by Pioneer 11 in September 1979. It flew within 20,000 kilometres (12,000 mi) of the top of the planet's cloud layer. Low-resolution images were acquired of the planet and a few of its moons; the resolution of the images was not good enough to discern surface featu