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Saturn has been known since prehistoric times, [134] and in early recorded history it was a major character in various mythologies. Babylonian astronomers systematically observed and recorded the movements of Saturn. [135] In ancient Greek, the planet was known as Φαίνων Phainon, [136] and in Roman times it was known as the "star of ...
Huygens [12] first "published" his discovery as an anagram, sent out on 13 June 1655; later published in pamphlet form as De Saturni luna Observatio Nova and in full in Systema Saturnium [13] (July 1659). 1670s o: 25 October 1671 p: 1673 Iapetus: Saturn VIII Saturn III (1673–1684), Saturn V (1686–1789), Saturn VII (1789–1848) Cassini [14]
Jupiter and Saturn have several large moons, such as Io, Europa, Ganymede and Titan, which may have originated from discs around each giant planet in much the same way that the planets formed from the disc around the Sun. [88] [89] [90] This origin is indicated by the large sizes of the moons and their proximity to the planet. These attributes ...
1979 – Pioneer 11 flies by Saturn, providing the first ever closeup images of the planet and its rings. It discovers the planet's F ring and determines that its moon Titan has a thick atmosphere. [199] 1979 – Goldreich and Tremaine postulate that Saturn's F ring is maintained by shepherd moons, a prediction that would be confirmed by ...
The first probe to explore the outer planets was Pioneer 10, which flew by Jupiter in 1973. Pioneer 11 was the first to visit Saturn, in 1979. The Voyager probes performed a Grand Tour of the outer planets following their launch in 1977, with both probes passing Jupiter in 1979 and Saturn in 1980–1981.
Jupiter/Saturn/first Uranus/first Neptune flyby [239] [240] [241] Voyager 1: 5 September 1977 Jupiter/Saturn flyby, first to exit the heliosphere [241] [242] [243] Pioneer Venus 1: 20 May 1978 Venus orbiter [244] [245] Pioneer Venus 2: 8 August 1978 Venus atmospheric probes [246] [247] ISEE-3: 12 August 1978
French philosopher and mathematician René Descartes was the first to propose a model for the origin of the Solar System in his book The World, written from 1629 to 1633.. In his view, the universe was filled with vortices of swirling particles, and both the Sun and planets had condensed from a large vortex that had contracted, which he thought could explain the circular motion of the plane
The 2006 IAU redefinition of planet excludes the possibility of double planets. [24] [25] [26] 15760 Albion: 1992 unknown Trans-Neptunian object: When discovered, these bodies were briefly hailed as the tenth and eleventh planets by the press, but it was then decided that 15760 Albion was the prototype of trans-Neptunian objects or cubewanos ...