Question

Which planet besides Neptune is known as the 'Blue Planet'? 
1. Earth
2. Mars 
3. Pluto 
4. Jupiter 

Answer 1

Correct Answer - Option 1 : Earth

The correct answer is Earth.

• The Earth is 23 ½ degrees tilted on its axis and thus makes 66 ½ degrees angle.
• It is known as a watery planet or blue planet due to the presence of huge amounts of water in it.
• The mass of the Earth is 6 × 1024 kg and the mass of the Moon is 7 × 1022 kg.

• The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet in 2006 because it did not meet the three criteria the IAU uses to define a full-sized planet.

Inner or terrestrial planets	Outer plant or Jovian planets
Mercury	Jupiter
Venus	Saturn
Mars	Uranus
Earth	Neptune