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International Edition Winners 2009: India (Grade 5-6: Target 3)

International Edition Winners 2009: India (Grade 5-6: Target 3)

Target 3: Titan
J. Vishnu Priya
KLR Techno Kids School

6th Grade; Teacher: Dr. K.Lakshma Reddy

" As I am a scientist I am telling about Titan. Titan is fifteenth of Saturn's known satellite a diameter of 3,200 miles. Titan is the targen moon of Saturn and second largest moon is the solar system. Although titan is classified as moon, it is larger than the planet mercury and Pluto.

Titan is the only moon in solar system with substantial atmosphere which is loaded with nitrogen laced with poisonous substance as methane. The nitrogen with hydrocarbon elements in air, gives titan its orange hue. Titan atmosphere is more dense than these of mercury, earth and mars. The atmospheric pressure near the surface is about 1.6 bars, 60 percent greater than earths. Hydrocarbon elements are building blocs for amino acids necessary for formation of life. Scientists believe that titans environment may be similar to that of earths before life began putting oxygen into atmosphere.

Titans atmosphere surface temperature appears to be about -178 degree Celsius (-289 degree Fahrenheit), so cold that water is would be as hard as granite, Cassini spacecraft has found lakes on Saturn's moon titan. Many scientists theorize that titan may be covered by lakes and oceans of methane. Titan has hundreds of times more liquid hydrocarbons than all known oil and national gas resources on earth. Titan shows evidence of evaporation, rain and fluid-carved channels chaining into liquid hydrocarbon calees. Earth has hydrological cycle based on water and titan has cycle based on methane.

Titan makes one complete orbit round Saturn in 16 days, scientist have suspected that titan's rotation also takes 16 days, so that the same hemisphere of titan always faces Saturn, hust as the same hemisphere earths moon always faces the earth. Titan rotation is sychnor0onous like most of Saturn's other moon.

Titan has no magnetic field and sometimes orbits outside Saturn's magnetosphere. It there fore directly exposed to solar wind.

Titan surface remained shaded in secrecy below the clouds until July 2004. that when nasa Cassini spacecraft arrived at Saturn. With its RADAR and infrared imaging instruments Cassini was able to life the veil on titan.

Titan is rich and complex world which still holds many mysteries, researches are continuing to monitor the surface as the seasons change to see if new lakes form or old ones evaporate and are searching for additional evidence that cryvolcanoes that is volcanoes erupting rock water, ammonium or methane instead of molten lava are active on the surface.

Titan resembles earth several billion years ago, the weather is cold in titan few people believe that life as we known it currently exists on titan because of extreme cold and lack of oxygen and water liquids. Titan has a diameter of 5,140 km over earth is 12756 km and mars is 6787 km

Cassini has mapped about 20 percent of titan's surface with water. Titan has not yield its secrets easily because the dense smoggy atmosphere makes it very difficult to obtain good visible images. To see Saturn you would need to be standing on the side of titan that always faces Saturn. The astronomer Chiristian Huygens saw Saturn's moon titan from earth with a 17tth century telescope. "