[Geography] Planets and Satellites, Mercury, Venus, The Earth & Mars

Table of Contents

Some Notable Facts About Various Planets and Satellites

Mercury, Venus,The Earth & Mars


  • Mercury is the closest planet to the Sun.

  • It is extremely hot planet.

  • The planet has no water on it.

  • Mercury planet has no gases like CO2, N2, H2, and O2 which can act as building blocks of life.

  • Mercury planet has no protective blanket like Ozone around it to prevent us from harmful radiations.


  • Venus is the second planet in distance from the Sun. This planet is nearest to the Earth and is also the brightest planet.

  • Venus is known as the “Evening Star” as well as “Morning Star”.

  • Venus is surrounded by a thick cloud cover, hence known as the “Veiled Planet” veil ‘means unclear/cover).

  • Venus is like the Earth in size and mass, and hence also known as the “Earth’s twin”.

  • Venus is a very hot planet.

  • Venus has no water on it.

  • There is no sufficient oxygen on the Venus.

The Earth

  • Earth is the largest of the inner planets.

  • The Earth is 23 ½ ° tilted on its axis and thus makes 66 ½ ° angle.

  • It takes 23 hours 56 minutes and 4.091 seconds to rotate on its axis.

  • It takes 365 days, 5 hours and 48 minutes to revolve around the Sun.

  • Earth is known as the “watery planet” or the “blue planet” due to the presence of huge amount of water on it.

  • The Earth is the only known planet which provides sustenance or life it. It has a large quantity of oxygen which supports life.

  • The earth has all the essential elements like carbon (in the form of CO2) , hydrogen ( H2), nitrogen ( N2) an oxygen ( O2) which act as building blocks for the origin of life.

  • The earth is neither to hot nor too cold. It has ‘Goldilock Zone’.

  • ‘Goldilock Zone’ is the habitable Zone of solar system where all conditions are available for life to sustain.

  • The earth has a lot of water in the form of lakes, rivers and oceans for growth and survival of life.

  • The earth has enough oxygen gas in its atmosphere for the survival of living beings through breathing.

  • The earth has a protective blanket of ozone layer high up in its atmosphere to save life from the harmful ultraviolet radiations coming from the sun.


  • Iron-rich red soil and pink sky of Mars give it the name, “Red Planet”.

  • Phobos and Demos are two satellites of Mars.

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