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The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
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 ...
Saturn is the sixth planet from the Sun and the second largest in the Solar System, after Jupiter. It is a gas giant , with an average radius of about nine times that of Earth . [ 27 ] [ 28 ] It has an eighth the average density of Earth, but is over 95 times more massive.
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 ...
They are from brightest to dimmest: the Sun, the Moon, Venus, Jupiter, Mars, Mercury and Saturn. Greek astronomers such as Geminus [ 1 ] and Ptolemy [ 2 ] recorded these classical planets during classical antiquity , introducing the term planet , which means 'wanderer' in Greek ( πλάνης planēs and πλανήτης planētēs ...
Phaenon (Greek: Φαίνων) in Greek mythology is the sky god of the star of Cronus (as in the planet Saturn).The name Phaenon is sometimes used poetically to refer to the planet Saturn; [1] 'Phaenon' means 'bright' or 'shining', and Saturn is a bright planet which is easy to see.
Kajamānu or Kayyamanu (Akkadian: 𒅗𒀀𒀀𒈠𒉡 ka-a-a-ma-nu "the constant") or Uduimin-saĝuš (Sumerian: 𒀯𒇻𒅂𒊕𒍑 MUL UDU.IMIN-saĝ-uš, "star of the sun") is the ancient Mesopotamian name for the planet Saturn. In ancient Mesopotamia, he was also regarded as the "star of Ninurta," the Mesopotamian fertility deity. [1] [2] [3]
A later model, from 1940 and 1941, involved a triple star system, a binary plus the Sun, in which the binary merged and later split because of rotational instability and escaped from the system, leaving a filament that formed between them to be captured by the Sun. Objections of Lyman Spitzer apply to this model also. [clarification needed]