Facts About our Planet — the Earth

 Estimated age of the Earth : 4600 million years.

The Earth is 23½° tilted on its axis and thus makes 66½º angle with the plane of its orbit

It takes 365 days and 5 hours 45 minutes to revolve around the Sun.

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

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

 Mean distance from the Sun : 149,407,000 kms.

 Equatorial diameter : 12753 kms.

 Polar diameter : 12710 kms

 Equatorial circumference : 40,066 kms.

 Period of rotation : 23 hrs. 56 mts. 4.09 sec. (24 hrs.)

 Period of revolution : 365 days 5 hours 48 mts and 45.51 seconds. (365¼ days)

 Total area : 510,100,500 sq. kms.

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The atmosphere is composed of:

Nitrogen (78.09%),

Oxygen (20.95%),

Argon(0.93%),

Other gases(0.03%)

Air pressure