Indira Gandhi Planetarium, Lucknow Veer Bahadur Singh Planetarium, Gorakhpur        Aryabhatt Planetarium, Rampur


Saturn is the sixth planet from the Sun and the second largest planet in the Solar System.Saturn has an average radius about nine-times larger than Earth's. While only one-eighth the average density of Earth, due to its larger volume, Saturn's mass is just over ninety-five times greater than Earth's
It is the least dense of all the planets.It has a diameter of about 120,536 km and rotation and revolution period of 0.44 and 29.46 Earth years respectively.

Internal Structure of saturn:

Saturn has a rocky core surrounded mostly by hydrogen and helium. This rocky core is similar in composition to the Earth, but is denser.
Above this, there is a thicker liquid metallic hydrogen layer, followed by a layer of liquid hydrogen and helium.
In the outermost,a 1000 kms of gaseous atmosphere that consists of 96.3% molecular hydrogen, 3.25% helium and traces of various volatiles are also present.

Atmospheric composition of Saturn:

Components   Percentage Composition  
hydrogen   ~96%  
helium   ~3%  
methane   ~0.4%  
ammonia   ~0.01  
hydrogen deuteride   ~0.01  
ethane   0.0007  
ammonia   (ices)  
water   (ices)  
ammonium hydrosulphide   (ices)