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List of Hottest and Coldest Planets in the Solar System

Nov 15, 2018 14:58 IST
    List of Hottest and Coldest Planets in the Solar System

    The temperature of the planets in the Solar system depends upon the structure and the distance from the Sun. Moreover, the nature and composition of the atmosphere of the planets determined by the points- how much the amount of the heat radiated by the planets as well as how much the heat retains by the planets.

    Hottest and Coldest Planet in the Solar System

    The lists of hottest and coldest planets in the solar System are discussed below:

    9. Pluto     

    Mean Temperature: -225 Degree Celsius

    It is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. It was the first Kuiper belt object to be discovered. It is made up of ice and rock. The atmosphere of this planet is consists of nitrogen (N2), methane (CH4), and carbon monoxide (CO), which are in equilibrium with their ices. It has recorded the coldest temperatures at an average of -225ºC.

    8. Neptune

    Mean Temperature: -200 Degree Celsius

    It is the eighth and farthest known planet from the Sun. It is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet in the Solar System.

    7. Uranus  

    Mean Temperature: -195 Degree Celsius

    It is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. The atmosphere of this planet is similar to Jupiter's and Saturn's in its primary composition of hydrogen and helium, but it contains more "ices" such as water, ammonia, and methane, along with traces of other hydrocarbons.

    6. Saturn   

    Mean Temperature: -140 Degree Celsius

    It is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is composed of a core of iron–nickel and rock (silicon and oxygen compounds). The atmosphere of this planet contains 96.3% molecular hydrogen and 3.25% helium by volume.

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    5. Jupiter  

    Mean Temperature: -110 Degree Celsius

    It is the fifth planet from the Sun and the largest in the Solar System. It is composed of hydrogen with a quarter of its mass being helium, though helium comprises only about a tenth of the number of molecules. The atmosphere this planet is composed of ammonia crystals and possibly ammonium hydrosulphide.

    4. Mars      

    Mean Temperature: -65 Degree Celsius

    It is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury. It is one of the terrestrial planet in the Solar System with a thin atmosphere. The atmosphere of this planet is consists of about 96% carbon dioxide, 1.93% argon and 1.89% nitrogen along with traces of oxygen and water.

    3. Earth     

    Mean Temperature: 15 Degree Celsius

    It is third planet from the Sun. It has the layers of gases surrounding the earth that consists of exosphere, thermosphere, mesosphere, stratosphere and troposphere. The air content and favourable atmospheric pressure also supported life of most creatures. The air content of carbon dioxide on the Earth is less than that of planets like Venus and Mars. Hence, the less air content of carbon dioxide helps to moderate the Earth's temperature and is absorbed by plants during photosynthesis to produce oxygen.

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    2. Mercury

    Mean Temperature (C): 167 Degree Celsius

    It is the first planet which is nearest to Sun. It is second hottest planet in the Solar System but this planet has no atmosphere, thus experiences varying temperatures throughout the day. The temperature may fall to -93ºC or rise to 427ºC with an average of 167ºC.

    1. Venus    

    Mean Temperature: 464 Degree Celsius

    It is second planet which nearest to the Sun but the hottest in the Solar System. It is one of the four terrestrial planets in the Solar System. It has a dense atmosphere of carbon dioxide (96.5%) and remaining 3.5% being nitrogen that traps the heat in a runaway version of the greenhouse effect which makes it a hottest planet.

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    List of Hottest and Coldest Planet in the Solar System

    Name of Planets (Hottest to Coldest)

    Mean Temperature (Degree Celsius)

    1. Venus

    464

    2. Mercury

    167

    3. Earth

    15

    4. Mars

    -65

    5. Jupiter

    -110

    6. Saturn

    -140

    7. Uranus

    -195

    8. Neptune

    -200

    9. Pluto

    -225

    There are two types of planets in the Solar System- First one is Terrestrials planets and second one is the Giant planets (Gas giants and Ice Giants).

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