စနေဂြိုဟ်: တည်းဖြတ်မှု မူကွဲများ

 

==ရုပ်ပိုင်းဆိုင်ရာ လက္ခဏာများ==

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Its flattened shape is due to its very fast rotation, rotating once every 10.8 Earth hours. Saturn is the only planet in the [[Solar System]] that is less [[density|dense]] than [[water]]. Even though the planet's [[planetary core|core]] is very dense, it has a gaseous [[atmosphere]], so its average [[relative density|specific density]] of the planet is 0.69 g/cm³ (less than water). As a result, if Saturn were placed in a large pool of water, it would float on it.

Saturn is best known for its clearly visible [[planetary rings]] which makes it the most visually remarkable object in the solar system. The rings were first discovered by [[Galileo Galilei]] in [[1610]], using his [[telescope]]. He did not identify them as rings though, describing them as "ears". He stated that Saturn was actually three separate planets that almost touch one another. In 1612, when the rings were facing edge on with the Earth, the rings disappeared, then reappeared again in 1613, further confusing Galileo.<ref name="history_of_the_rings">Baalke, Ron. [http://www2.jpl.nasa.gov/saturn/back.html Historical Background of Saturn's Rings]. ''Saturn Ring Plane Crossings of 1995-1996''. Jet Propulsion Laboratory. Retrieved on [[May 23]], [[2007]].</ref> In 1655, [[Christiaan Huygens]] was the first person who suggested that Saturn was surrounded by rings. He observed Saturn using a much more powerful telescope than Galilei's. He quoted that "It [Saturn] is surrounded by a thin, flat, ring, nowhere touching, inclined to the ecliptic."<ref name="history_of_the_rings"/> In 1675, [[Giovanni Domenico Cassini]] discovered that the planet's rings were in fact made of smaller ringlets with gaps. The largest ring gap was later named the Cassini Division. In 1859, [[James Clerk Maxwell]] showed that the rings cannot be solid, but are made of small particles, each orbiting Saturn on their own, otherwise, it would become unstable or break apart.<ref>[http://www-history.mcs.st-andrews.ac.uk/~history/Extras/Maxwell_Saturn.html James Clerk Maxwell on the nature of Saturn's rings]. Retrieved on July 6, 2007.</ref> James Keeler studied the rings using a [[spectrometer|spectroscope]] in 1895 which proved Maxwell's theory to be correct.

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== ဆက်စပ်ဖတ်ရှုရန် ==

*[[နက်ပကျွန်းဂြိုဟ်]]