The sun's mass is made up of around

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  1. 25% Oxygen
  2. 90% Nitrogen
  3. 88.8% Nitrogen
  4. 0.80% Oxygen

Answer (Detailed Solution Below)

Option 4 : 0.80% Oxygen
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HTET PGT Official Computer Science Paper - 2019
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Detailed Solution

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The correct answer is 0.80% Oxygen.

  • The sun's mass is made up of around 0.80% Oxygen.

Key Points

  • Composition of the sun:
    • 73% of the Sun’s mass is hydrogen, and another 25% is helium
    • The Sun and the stars are made up of mostly hydrogen and helium.
    • It was first shown in a thesis in 1925 by Cecilia Payne-Gaposchkin.
    • The core is approximately 20% of the size of the solar interior and has a temperature of approximately 15 million K.
    • It generates its energy by nuclear fusion of hydrogen nuclei into helium.
    • The inner layers are the Core, Radiative Zone and Convection Zone.
    • The outer layers are the Photosphere, the Chromosphere, the Transition Region and the Corona.

Additional Information

  • Solar Missions:
    • Genesis was the first solar mission and spacecraft to capture a sample of the solar wind.
    • Aditya-L1 is the first solar mission of India to study the Sun.
    • NASA’s Parker Solar Probe is the first mission to touch the Sun.
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